content/browser/service_worker/service_worker_version.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/service_worker/service_worker_version.h"
   6
   7 #include <algorithm>
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/command_line.h"
  12 #include "base/guid.h"
  13 #include "base/location.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/metrics/histogram_macros.h"
  16 #include "base/single_thread_task_runner.h"
  17 #include "base/stl_util.h"
  18 #include "base/strings/string16.h"
  19 #include "base/strings/utf_string_conversions.h"
  20 #include "base/thread_task_runner_handle.h"
  21 #include "base/time/time.h"
  22 #include "content/browser/bad_message.h"
  23 #include "content/browser/child_process_security_policy_impl.h"
  24 #include "content/browser/message_port_message_filter.h"
  25 #include "content/browser/message_port_service.h"
  26 #include "content/browser/service_worker/embedded_worker_instance.h"
  27 #include "content/browser/service_worker/embedded_worker_registry.h"
  28 #include "content/browser/service_worker/service_worker_context_core.h"
  29 #include "content/browser/service_worker/service_worker_context_wrapper.h"
  30 #include "content/browser/service_worker/service_worker_metrics.h"
  31 #include "content/browser/service_worker/service_worker_registration.h"
  32 #include "content/browser/storage_partition_impl.h"
  33 #include "content/common/service_worker/service_worker_messages.h"
  34 #include "content/common/service_worker/service_worker_type_converters.h"
  35 #include "content/common/service_worker/service_worker_utils.h"
  36 #include "content/public/browser/browser_thread.h"
  37 #include "content/public/browser/content_browser_client.h"
  38 #include "content/public/browser/page_navigator.h"
  39 #include "content/public/browser/render_frame_host.h"
  40 #include "content/public/browser/render_process_host.h"
  41 #include "content/public/browser/web_contents.h"
  42 #include "content/public/browser/web_contents_observer.h"
  43 #include "content/public/common/background_sync.mojom.h"
  44 #include "content/public/common/child_process_host.h"
  45 #include "content/public/common/content_client.h"
  46 #include "content/public/common/content_switches.h"
  47 #include "content/public/common/result_codes.h"
  48 #include "content/public/common/service_registry.h"
  49 #include "mojo/common/common_type_converters.h"
  50 #include "mojo/common/url_type_converters.h"
  51 #include "net/http/http_response_headers.h"
  52 #include "net/http/http_response_info.h"
  53
  54 namespace content {
  55
  56 using StatusCallback = ServiceWorkerVersion::StatusCallback;
  57 using ServiceWorkerClients = std::vector<ServiceWorkerClientInfo>;
  58 using GetClientsCallback =
  59     base::Callback<void(scoped_ptr<ServiceWorkerClients>)>;
  60
  61 namespace {
  62
  63 // Delay between the timeout timer firing.
  64 const int kTimeoutTimerDelaySeconds = 30;
  65
  66 // Time to wait until stopping an idle worker.
  67 const int kIdleWorkerTimeoutSeconds = 30;
  68
  69 // Time until a stopping worker is considered stalled.
  70 const int kStopWorkerTimeoutSeconds = 30;
  71
  72 // Default delay for scheduled update.
  73 const int kUpdateDelaySeconds = 1;
  74
  75 // Timeout for waiting for a response to a ping.
  76 const int kPingTimeoutSeconds = 30;
  77
  78 // If the SW was destructed while starting up, how many seconds it
  79 // had to start up for this to be considered a timeout occurrence.
  80 const int kDestructedStartingWorkerTimeoutThresholdSeconds = 5;
  81
  82 const char kClaimClientsStateErrorMesage[] =
  83     "Only the active worker can claim clients.";
  84
  85 const char kClaimClientsShutdownErrorMesage[] =
  86     "Failed to claim clients due to Service Worker system shutdown.";
  87
  88 void RunSoon(const base::Closure& callback) {
  89   if (!callback.is_null())
  90     base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, callback);
  91 }
  92
  93 template <typename CallbackArray, typename Arg>
  94 void RunCallbacks(ServiceWorkerVersion* version,
  95                   CallbackArray* callbacks_ptr,
  96                   const Arg& arg) {
  97   CallbackArray callbacks;
  98   callbacks.swap(*callbacks_ptr);
  99   for (const auto& callback : callbacks)
 100     callback.Run(arg);
 101 }
 102
 103 template <typename IDMAP, typename... Params>
 104 void RunIDMapCallbacks(IDMAP* requests, const Params&... params) {
 105   typename IDMAP::iterator iter(requests);
 106   while (!iter.IsAtEnd()) {
 107     iter.GetCurrentValue()->callback.Run(params...);
 108     iter.Advance();
 109   }
 110   requests->Clear();
 111 }
 112
 113 template <typename CallbackType, typename... Params>
 114 bool RunIDMapCallback(IDMap<CallbackType, IDMapOwnPointer>* requests,
 115                       int request_id,
 116                       const Params&... params) {
 117   CallbackType* request = requests->Lookup(request_id);
 118   if (!request)
 119     return false;
 120
 121   request->callback.Run(params...);
 122   requests->Remove(request_id);
 123   return true;
 124 }
 125
 126 void RunStartWorkerCallback(
 127     const StatusCallback& callback,
 128     scoped_refptr<ServiceWorkerRegistration> protect,
 129     ServiceWorkerStatusCode status) {
 130   callback.Run(status);
 131 }
 132
 133 // A callback adapter to start a |task| after StartWorker.
 134 void RunTaskAfterStartWorker(
 135     base::WeakPtr<ServiceWorkerVersion> version,
 136     const StatusCallback& error_callback,
 137     const base::Closure& task,
 138     ServiceWorkerStatusCode status) {
 139   if (status != SERVICE_WORKER_OK) {
 140     if (!error_callback.is_null())
 141       error_callback.Run(status);
 142     return;
 143   }
 144   if (version->running_status() != ServiceWorkerVersion::RUNNING) {
 145     // We've tried to start the worker (and it has succeeded), but
 146     // it looks it's not running yet.
 147     NOTREACHED() << "The worker's not running after successful StartWorker";
 148     if (!error_callback.is_null())
 149       error_callback.Run(SERVICE_WORKER_ERROR_START_WORKER_FAILED);
 150     return;
 151   }
 152   task.Run();
 153 }
 154
 155 void RunErrorFetchCallback(const ServiceWorkerVersion::FetchCallback& callback,
 156                            ServiceWorkerStatusCode status) {
 157   callback.Run(status,
 158                SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK,
 159                ServiceWorkerResponse());
 160 }
 161
 162 void RunErrorMessageCallback(
 163     const std::vector<TransferredMessagePort>& sent_message_ports,
 164     const ServiceWorkerVersion::StatusCallback& callback,
 165     ServiceWorkerStatusCode status) {
 166   // Transfering the message ports failed, so destroy the ports.
 167   for (const TransferredMessagePort& port : sent_message_ports) {
 168     MessagePortService::GetInstance()->ClosePort(port.id);
 169   }
 170   callback.Run(status);
 171 }
 172
 173 void RunErrorServicePortConnectCallback(
 174     const ServiceWorkerVersion::ServicePortConnectCallback& callback,
 175     ServiceWorkerStatusCode status) {
 176   callback.Run(status, false /* accept_connection */, base::string16(),
 177                base::string16());
 178 }
 179
 180 using OpenURLCallback = base::Callback<void(int, int)>;
 181
 182 // The OpenURLObserver class is a WebContentsObserver that will wait for a
 183 // WebContents to be initialized, run the |callback| passed to its constructor
 184 // then self destroy.
 185 // The callback will receive the process and frame ids. If something went wrong
 186 // those will be (kInvalidUniqueID, MSG_ROUTING_NONE).
 187 // The callback will be called in the IO thread.
 188 class OpenURLObserver : public WebContentsObserver {
 189  public:
 190   OpenURLObserver(WebContents* web_contents, const OpenURLCallback& callback)
 191       : WebContentsObserver(web_contents), callback_(callback) {}
 192
 193   void DidCommitProvisionalLoadForFrame(
 194       RenderFrameHost* render_frame_host,
 195       const GURL& validated_url,
 196       ui::PageTransition transition_type) override {
 197     DCHECK(web_contents());
 198
 199     if (render_frame_host != web_contents()->GetMainFrame())
 200       return;
 201
 202     RunCallback(render_frame_host->GetProcess()->GetID(),
 203                 render_frame_host->GetRoutingID());
 204   }
 205
 206   void RenderProcessGone(base::TerminationStatus status) override {
 207     RunCallback(ChildProcessHost::kInvalidUniqueID, MSG_ROUTING_NONE);
 208   }
 209
 210   void WebContentsDestroyed() override {
 211     RunCallback(ChildProcessHost::kInvalidUniqueID, MSG_ROUTING_NONE);
 212   }
 213
 214  private:
 215   void RunCallback(int render_process_id, int render_frame_id) {
 216     // After running the callback, |this| will stop observing, thus
 217     // web_contents() should return nullptr and |RunCallback| should no longer
 218     // be called. Then, |this| will self destroy.
 219     DCHECK(web_contents());
 220
 221     BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
 222                             base::Bind(callback_,
 223                                        render_process_id,
 224                                        render_frame_id));
 225     Observe(nullptr);
 226     base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 227   }
 228
 229   const OpenURLCallback callback_;
 230
 231   DISALLOW_COPY_AND_ASSIGN(OpenURLObserver);
 232 };
 233
 234 void DidOpenURL(const OpenURLCallback& callback, WebContents* web_contents) {
 235   DCHECK(web_contents);
 236
 237   new OpenURLObserver(web_contents, callback);
 238 }
 239
 240 void NavigateClientOnUI(const GURL& url,
 241                         const GURL& script_url,
 242                         int process_id,
 243                         int frame_id,
 244                         const OpenURLCallback& callback) {
 245   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 246
 247   RenderFrameHost* render_frame_host =
 248       RenderFrameHost::FromID(process_id, frame_id);
 249   WebContents* web_contents =
 250       WebContents::FromRenderFrameHost(render_frame_host);
 251
 252   if (!render_frame_host || !web_contents) {
 253     BrowserThread::PostTask(
 254         BrowserThread::IO, FROM_HERE,
 255         base::Bind(callback, ChildProcessHost::kInvalidUniqueID,
 256                    MSG_ROUTING_NONE));
 257     return;
 258   }
 259
 260   OpenURLParams params(
 261       url, Referrer::SanitizeForRequest(
 262                url, Referrer(script_url, blink::WebReferrerPolicyDefault)),
 263       CURRENT_TAB, ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
 264       true /* is_renderer_initiated */);
 265   web_contents->OpenURL(params);
 266   DidOpenURL(callback, web_contents);
 267 }
 268
 269 void OpenWindowOnUI(
 270     const GURL& url,
 271     const GURL& script_url,
 272     int process_id,
 273     const scoped_refptr<ServiceWorkerContextWrapper>& context_wrapper,
 274     const OpenURLCallback& callback) {
 275   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 276
 277   BrowserContext* browser_context = context_wrapper->storage_partition()
 278       ? context_wrapper->storage_partition()->browser_context()
 279       : nullptr;
 280   // We are shutting down.
 281   if (!browser_context)
 282     return;
 283
 284   RenderProcessHost* render_process_host =
 285       RenderProcessHost::FromID(process_id);
 286   if (render_process_host->IsForGuestsOnly()) {
 287     BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
 288                             base::Bind(callback,
 289                                        ChildProcessHost::kInvalidUniqueID,
 290                                        MSG_ROUTING_NONE));
 291     return;
 292   }
 293
 294   OpenURLParams params(
 295       url, Referrer::SanitizeForRequest(
 296                url, Referrer(script_url, blink::WebReferrerPolicyDefault)),
 297       NEW_FOREGROUND_TAB, ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
 298       true /* is_renderer_initiated */);
 299
 300   GetContentClient()->browser()->OpenURL(
 301       browser_context, params,
 302       base::Bind(&DidOpenURL, callback));
 303 }
 304
 305 void KillEmbeddedWorkerProcess(int process_id, ResultCode code) {
 306   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 307   RenderProcessHost* render_process_host =
 308       RenderProcessHost::FromID(process_id);
 309   if (render_process_host->GetHandle() != base::kNullProcessHandle) {
 310     bad_message::ReceivedBadMessage(render_process_host,
 311                                     bad_message::SERVICE_WORKER_BAD_URL);
 312   }
 313 }
 314
 315 void ClearTick(base::TimeTicks* time) {
 316   *time = base::TimeTicks();
 317 }
 318
 319 void RestartTick(base::TimeTicks* time) {
 320   *time = base::TimeTicks().Now();
 321 }
 322
 323 base::TimeDelta GetTickDuration(const base::TimeTicks& time) {
 324   if (time.is_null())
 325     return base::TimeDelta();
 326   return base::TimeTicks().Now() - time;
 327 }
 328
 329 void OnGetWindowClientsFromUI(
 330     // The tuple contains process_id, frame_id, client_uuid.
 331     const std::vector<base::Tuple<int, int, std::string>>& clients_info,
 332     const GURL& script_url,
 333     const GetClientsCallback& callback) {
 334   scoped_ptr<ServiceWorkerClients> clients(new ServiceWorkerClients);
 335
 336   for (const auto& it : clients_info) {
 337     ServiceWorkerClientInfo info =
 338         ServiceWorkerProviderHost::GetWindowClientInfoOnUI(base::get<0>(it),
 339                                                            base::get<1>(it));
 340
 341     // If the request to the provider_host returned an empty
 342     // ServiceWorkerClientInfo, that means that it wasn't possible to associate
 343     // it with a valid RenderFrameHost. It might be because the frame was killed
 344     // or navigated in between.
 345     if (info.IsEmpty())
 346       continue;
 347
 348     // We can get info for a frame that was navigating end ended up with a
 349     // different URL than expected. In such case, we should make sure to not
 350     // expose cross-origin WindowClient.
 351     if (info.url.GetOrigin() != script_url.GetOrigin())
 352       continue;
 353
 354     info.client_uuid = base::get<2>(it);
 355     clients->push_back(info);
 356   }
 357
 358   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
 359                           base::Bind(callback, base::Passed(&clients)));
 360 }
 361
 362 void AddWindowClient(
 363     ServiceWorkerProviderHost* host,
 364     std::vector<base::Tuple<int, int, std::string>>* client_info) {
 365   if (host->client_type() != blink::WebServiceWorkerClientTypeWindow)
 366     return;
 367   client_info->push_back(base::MakeTuple(host->process_id(), host->frame_id(),
 368                                          host->client_uuid()));
 369 }
 370
 371 void AddNonWindowClient(ServiceWorkerProviderHost* host,
 372                         const ServiceWorkerClientQueryOptions& options,
 373                         ServiceWorkerClients* clients) {
 374   blink::WebServiceWorkerClientType host_client_type = host->client_type();
 375   if (host_client_type == blink::WebServiceWorkerClientTypeWindow)
 376     return;
 377   if (options.client_type != blink::WebServiceWorkerClientTypeAll &&
 378       options.client_type != host_client_type)
 379     return;
 380
 381   ServiceWorkerClientInfo client_info(blink::WebPageVisibilityStateHidden,
 382                                       false,  // is_focused
 383                                       host->document_url(),
 384                                       REQUEST_CONTEXT_FRAME_TYPE_NONE,
 385                                       base::TimeTicks(), host_client_type);
 386   client_info.client_uuid = host->client_uuid();
 387   clients->push_back(client_info);
 388 }
 389
 390 bool IsInstalled(ServiceWorkerVersion::Status status) {
 391   switch (status) {
 392     case ServiceWorkerVersion::NEW:
 393     case ServiceWorkerVersion::INSTALLING:
 394     case ServiceWorkerVersion::REDUNDANT:
 395       return false;
 396     case ServiceWorkerVersion::INSTALLED:
 397     case ServiceWorkerVersion::ACTIVATING:
 398     case ServiceWorkerVersion::ACTIVATED:
 399       return true;
 400   }
 401   NOTREACHED() << "Unexpected status: " << status;
 402   return false;
 403 }
 404
 405 struct ServiceWorkerClientInfoSortMRU {
 406   bool operator()(const ServiceWorkerClientInfo& a,
 407                   const ServiceWorkerClientInfo& b) const {
 408     return a.last_focus_time > b.last_focus_time;
 409   }
 410 };
 411
 412 }  // namespace
 413
 414 const int ServiceWorkerVersion::kStartWorkerTimeoutMinutes = 5;
 415 const int ServiceWorkerVersion::kRequestTimeoutMinutes = 5;
 416
 417 class ServiceWorkerVersion::Metrics {
 418  public:
 419   using EventType = ServiceWorkerMetrics::EventType;
 420   explicit Metrics(ServiceWorkerVersion* owner) : owner_(owner) {}
 421   ~Metrics() {
 422     if (owner_->should_exclude_from_uma_)
 423       return;
 424     for (const auto& ev : event_stats_) {
 425       ServiceWorkerMetrics::RecordEventHandledRatio(
 426           ev.first, ev.second.handled_events, ev.second.fired_events);
 427     }
 428   }
 429
 430   void RecordEventHandledStatus(EventType event, bool handled) {
 431     event_stats_[event].fired_events++;
 432     if (handled)
 433       event_stats_[event].handled_events++;
 434   }
 435
 436   void NotifyStopping() {
 437     stop_status_ = ServiceWorkerMetrics::STOP_STATUS_STOPPING;
 438   }
 439
 440   void NotifyStopped() {
 441     switch (stop_status_) {
 442       case ServiceWorkerMetrics::STOP_STATUS_STOPPED:
 443       case ServiceWorkerMetrics::STOP_STATUS_STALLED_THEN_STOPPED:
 444         return;
 445       case ServiceWorkerMetrics::STOP_STATUS_STOPPING:
 446         stop_status_ = ServiceWorkerMetrics::STOP_STATUS_STOPPED;
 447         break;
 448       case ServiceWorkerMetrics::STOP_STATUS_STALLED:
 449         stop_status_ = ServiceWorkerMetrics::STOP_STATUS_STALLED_THEN_STOPPED;
 450         break;
 451       case ServiceWorkerMetrics::NUM_STOP_STATUS_TYPES:
 452         NOTREACHED();
 453         return;
 454     }
 455     if (IsInstalled(owner_->status()))
 456       ServiceWorkerMetrics::RecordStopWorkerStatus(stop_status_);
 457   }
 458
 459   void NotifyStalledInStopping() {
 460     if (stop_status_ != ServiceWorkerMetrics::STOP_STATUS_STOPPING)
 461       return;
 462     stop_status_ = ServiceWorkerMetrics::STOP_STATUS_STALLED;
 463     if (IsInstalled(owner_->status()))
 464       ServiceWorkerMetrics::RecordStopWorkerStatus(stop_status_);
 465   }
 466
 467  private:
 468   struct EventStat {
 469     size_t fired_events = 0;
 470     size_t handled_events = 0;
 471   };
 472
 473   ServiceWorkerVersion* owner_;
 474   std::map<EventType, EventStat> event_stats_;
 475   ServiceWorkerMetrics::StopWorkerStatus stop_status_ =
 476       ServiceWorkerMetrics::STOP_STATUS_STOPPING;
 477
 478   DISALLOW_COPY_AND_ASSIGN(Metrics);
 479 };
 480
 481 // A controller for periodically sending a ping to the worker to see
 482 // if the worker is not stalling.
 483 class ServiceWorkerVersion::PingController {
 484  public:
 485   explicit PingController(ServiceWorkerVersion* version) : version_(version) {}
 486   ~PingController() {}
 487
 488   void Activate() { ping_state_ = PINGING; }
 489
 490   void Deactivate() {
 491     ClearTick(&ping_time_);
 492     ping_state_ = NOT_PINGING;
 493   }
 494
 495   void OnPongReceived() { ClearTick(&ping_time_); }
 496
 497   bool IsTimedOut() { return ping_state_ == PING_TIMED_OUT; }
 498
 499   // Checks ping status. This is supposed to be called periodically.
 500   // This may call:
 501   // - OnPingTimeout() if the worker hasn't reponded within a certain period.
 502   // - PingWorker() if we're running ping timer and can send next ping.
 503   void CheckPingStatus() {
 504     if (GetTickDuration(ping_time_) >
 505         base::TimeDelta::FromSeconds(kPingTimeoutSeconds)) {
 506       ping_state_ = PING_TIMED_OUT;
 507       version_->OnPingTimeout();
 508       return;
 509     }
 510
 511     // Check if we want to send a next ping.
 512     if (ping_state_ != PINGING || !ping_time_.is_null())
 513       return;
 514
 515     if (version_->PingWorker() != SERVICE_WORKER_OK) {
 516       // TODO(falken): Maybe try resending Ping a few times first?
 517       ping_state_ = PING_TIMED_OUT;
 518       version_->OnPingTimeout();
 519       return;
 520     }
 521     RestartTick(&ping_time_);
 522   }
 523
 524   void SimulateTimeoutForTesting() {
 525     version_->PingWorker();
 526     ping_state_ = PING_TIMED_OUT;
 527     version_->OnPingTimeout();
 528   }
 529
 530  private:
 531   enum PingState { NOT_PINGING, PINGING, PING_TIMED_OUT };
 532   ServiceWorkerVersion* version_;  // Not owned.
 533   base::TimeTicks ping_time_;
 534   PingState ping_state_ = NOT_PINGING;
 535   DISALLOW_COPY_AND_ASSIGN(PingController);
 536 };
 537
 538 ServiceWorkerVersion::ServiceWorkerVersion(
 539     ServiceWorkerRegistration* registration,
 540     const GURL& script_url,
 541     int64 version_id,
 542     base::WeakPtr<ServiceWorkerContextCore> context)
 543     : version_id_(version_id),
 544       registration_id_(registration->id()),
 545       script_url_(script_url),
 546       scope_(registration->pattern()),
 547       context_(context),
 548       script_cache_map_(this, context),
 549       ping_controller_(new PingController(this)),
 550       should_exclude_from_uma_(
 551           ServiceWorkerMetrics::ShouldExcludeURLFromHistogram(scope_)),
 552       weak_factory_(this) {
 553   DCHECK(context_);
 554   DCHECK(registration);
 555   context_->AddLiveVersion(this);
 556   embedded_worker_ = context_->embedded_worker_registry()->CreateWorker();
 557   embedded_worker_->AddListener(this);
 558 }
 559
 560 ServiceWorkerVersion::~ServiceWorkerVersion() {
 561   in_dtor_ = true;
 562
 563   // The user may have closed the tab waiting for SW to start up.
 564   if (GetTickDuration(start_time_) >
 565       base::TimeDelta::FromSeconds(
 566           kDestructedStartingWorkerTimeoutThresholdSeconds)) {
 567     DCHECK(timeout_timer_.IsRunning());
 568     DCHECK(!embedded_worker_->devtools_attached());
 569     RecordStartWorkerResult(SERVICE_WORKER_ERROR_TIMEOUT);
 570   }
 571
 572   // Same with stopping.
 573   if (GetTickDuration(stop_time_) >
 574       base::TimeDelta::FromSeconds(kStopWorkerTimeoutSeconds)) {
 575     metrics_->NotifyStalledInStopping();
 576   }
 577
 578   if (context_)
 579     context_->RemoveLiveVersion(version_id_);
 580
 581   if (running_status() == STARTING || running_status() == RUNNING)
 582     embedded_worker_->Stop();
 583   embedded_worker_->RemoveListener(this);
 584 }
 585
 586 void ServiceWorkerVersion::SetStatus(Status status) {
 587   if (status_ == status)
 588     return;
 589
 590   status_ = status;
 591
 592   if (skip_waiting_ && status_ == ACTIVATED) {
 593     for (int request_id : pending_skip_waiting_requests_)
 594       DidSkipWaiting(request_id);
 595     pending_skip_waiting_requests_.clear();
 596   }
 597
 598   std::vector<base::Closure> callbacks;
 599   callbacks.swap(status_change_callbacks_);
 600   for (const auto& callback : callbacks)
 601     callback.Run();
 602
 603   FOR_EACH_OBSERVER(Listener, listeners_, OnVersionStateChanged(this));
 604 }
 605
 606 void ServiceWorkerVersion::RegisterStatusChangeCallback(
 607     const base::Closure& callback) {
 608   status_change_callbacks_.push_back(callback);
 609 }
 610
 611 ServiceWorkerVersionInfo ServiceWorkerVersion::GetInfo() {
 612   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 613   ServiceWorkerVersionInfo info(
 614       running_status(), status(), script_url(), registration_id(), version_id(),
 615       embedded_worker()->process_id(), embedded_worker()->thread_id(),
 616       embedded_worker()->worker_devtools_agent_route_id());
 617   for (const auto& controllee : controllee_map_) {
 618     const ServiceWorkerProviderHost* host = controllee.second;
 619     info.clients.insert(std::make_pair(
 620         host->client_uuid(),
 621         ServiceWorkerVersionInfo::ClientInfo(
 622             host->process_id(), host->route_id(), host->provider_type())));
 623   }
 624   if (!main_script_http_info_)
 625     return info;
 626   info.script_response_time = main_script_http_info_->response_time;
 627   if (main_script_http_info_->headers)
 628     main_script_http_info_->headers->GetLastModifiedValue(
 629         &info.script_last_modified);
 630   return info;
 631 }
 632
 633 void ServiceWorkerVersion::StartWorker(const StatusCallback& callback) {
 634   if (!context_) {
 635     RecordStartWorkerResult(SERVICE_WORKER_ERROR_ABORT);
 636     RunSoon(base::Bind(callback, SERVICE_WORKER_ERROR_ABORT));
 637     return;
 638   }
 639   if (is_redundant()) {
 640     RecordStartWorkerResult(SERVICE_WORKER_ERROR_REDUNDANT);
 641     RunSoon(base::Bind(callback, SERVICE_WORKER_ERROR_REDUNDANT));
 642     return;
 643   }
 644   prestart_status_ = status_;
 645
 646   // Ensure the live registration during starting worker so that the worker can
 647   // get associated with it in SWDispatcherHost::OnSetHostedVersionId().
 648   context_->storage()->FindRegistrationForId(
 649       registration_id_,
 650       scope_.GetOrigin(),
 651       base::Bind(&ServiceWorkerVersion::DidEnsureLiveRegistrationForStartWorker,
 652                  weak_factory_.GetWeakPtr(),
 653                  callback));
 654 }
 655
 656 void ServiceWorkerVersion::StopWorker(const StatusCallback& callback) {
 657   if (running_status() == STOPPED) {
 658     RunSoon(base::Bind(callback, SERVICE_WORKER_OK));
 659     return;
 660   }
 661   if (stop_callbacks_.empty()) {
 662     ServiceWorkerStatusCode status = embedded_worker_->Stop();
 663     if (status != SERVICE_WORKER_OK) {
 664       RunSoon(base::Bind(callback, status));
 665       return;
 666     }
 667   }
 668   stop_callbacks_.push_back(callback);
 669 }
 670
 671 void ServiceWorkerVersion::ScheduleUpdate() {
 672   if (!context_)
 673     return;
 674   if (update_timer_.IsRunning()) {
 675     update_timer_.Reset();
 676     return;
 677   }
 678   if (is_update_scheduled_)
 679     return;
 680   is_update_scheduled_ = true;
 681
 682   // Protect |this| until the timer fires, since we may be stopping
 683   // and soon no one might hold a reference to us.
 684   context_->ProtectVersion(make_scoped_refptr(this));
 685   update_timer_.Start(FROM_HERE,
 686                       base::TimeDelta::FromSeconds(kUpdateDelaySeconds),
 687                       base::Bind(&ServiceWorkerVersion::StartUpdate,
 688                                  weak_factory_.GetWeakPtr()));
 689 }
 690
 691 void ServiceWorkerVersion::StartUpdate() {
 692   if (!context_)
 693     return;
 694   context_->storage()->FindRegistrationForId(
 695       registration_id_, scope_.GetOrigin(),
 696       base::Bind(&ServiceWorkerVersion::FoundRegistrationForUpdate,
 697                  weak_factory_.GetWeakPtr()));
 698 }
 699
 700 void ServiceWorkerVersion::DeferScheduledUpdate() {
 701   if (update_timer_.IsRunning())
 702     update_timer_.Reset();
 703 }
 704
 705 void ServiceWorkerVersion::DispatchMessageEvent(
 706     const base::string16& message,
 707     const std::vector<TransferredMessagePort>& sent_message_ports,
 708     const StatusCallback& callback) {
 709   for (const TransferredMessagePort& port : sent_message_ports) {
 710     MessagePortService::GetInstance()->HoldMessages(port.id);
 711   }
 712
 713   DispatchMessageEventInternal(message, sent_message_ports, callback);
 714 }
 715
 716 void ServiceWorkerVersion::DispatchMessageEventInternal(
 717     const base::string16& message,
 718     const std::vector<TransferredMessagePort>& sent_message_ports,
 719     const StatusCallback& callback) {
 720   OnBeginEvent();
 721   if (running_status() != RUNNING) {
 722     // Schedule calling this method after starting the worker.
 723     StartWorker(base::Bind(
 724         &RunTaskAfterStartWorker, weak_factory_.GetWeakPtr(),
 725         base::Bind(&RunErrorMessageCallback, sent_message_ports, callback),
 726         base::Bind(&self::DispatchMessageEventInternal,
 727                    weak_factory_.GetWeakPtr(), message, sent_message_ports,
 728                    callback)));
 729     return;
 730   }
 731
 732   // TODO(kinuko): Cleanup this (and corresponding unit test) when message
 733   // event becomes extendable, round-trip event. (crbug.com/498596)
 734   RestartTick(&idle_time_);
 735
 736   MessagePortMessageFilter* filter =
 737       embedded_worker_->message_port_message_filter();
 738   std::vector<int> new_routing_ids;
 739   filter->UpdateMessagePortsWithNewRoutes(sent_message_ports, &new_routing_ids);
 740   ServiceWorkerStatusCode status =
 741       embedded_worker_->SendMessage(ServiceWorkerMsg_MessageToWorker(
 742           message, sent_message_ports, new_routing_ids));
 743   RunSoon(base::Bind(callback, status));
 744 }
 745
 746 void ServiceWorkerVersion::DispatchInstallEvent(
 747     const StatusCallback& callback) {
 748   OnBeginEvent();
 749   DCHECK_EQ(INSTALLING, status()) << status();
 750
 751   if (running_status() != RUNNING) {
 752     // Schedule calling this method after starting the worker.
 753     StartWorker(
 754         base::Bind(&RunTaskAfterStartWorker,
 755                    weak_factory_.GetWeakPtr(),
 756                    callback,
 757                    base::Bind(&self::DispatchInstallEventAfterStartWorker,
 758                               weak_factory_.GetWeakPtr(),
 759                               callback)));
 760   } else {
 761     DispatchInstallEventAfterStartWorker(callback);
 762   }
 763 }
 764
 765 void ServiceWorkerVersion::DispatchActivateEvent(
 766     const StatusCallback& callback) {
 767   OnBeginEvent();
 768   DCHECK_EQ(ACTIVATING, status()) << status();
 769
 770   if (running_status() != RUNNING) {
 771     // Schedule calling this method after starting the worker.
 772     StartWorker(
 773         base::Bind(&RunTaskAfterStartWorker,
 774                    weak_factory_.GetWeakPtr(),
 775                    callback,
 776                    base::Bind(&self::DispatchActivateEventAfterStartWorker,
 777                               weak_factory_.GetWeakPtr(),
 778                               callback)));
 779   } else {
 780     DispatchActivateEventAfterStartWorker(callback);
 781   }
 782 }
 783
 784 void ServiceWorkerVersion::DispatchFetchEvent(
 785     const ServiceWorkerFetchRequest& request,
 786     const base::Closure& prepare_callback,
 787     const FetchCallback& fetch_callback) {
 788   OnBeginEvent();
 789   DCHECK_EQ(ACTIVATED, status()) << status();
 790
 791   if (running_status() != RUNNING) {
 792     // Schedule calling this method after starting the worker.
 793     StartWorker(base::Bind(&RunTaskAfterStartWorker,
 794                            weak_factory_.GetWeakPtr(),
 795                            base::Bind(&RunErrorFetchCallback, fetch_callback),
 796                            base::Bind(&self::DispatchFetchEvent,
 797                                       weak_factory_.GetWeakPtr(),
 798                                       request,
 799                                       prepare_callback,
 800                                       fetch_callback)));
 801     return;
 802   }
 803
 804   prepare_callback.Run();
 805
 806   int request_id = AddRequest(fetch_callback, &fetch_requests_, REQUEST_FETCH);
 807   ServiceWorkerStatusCode status = embedded_worker_->SendMessage(
 808       ServiceWorkerMsg_FetchEvent(request_id, request));
 809   if (status != SERVICE_WORKER_OK) {
 810     fetch_requests_.Remove(request_id);
 811     RunSoon(base::Bind(&RunErrorFetchCallback,
 812                        fetch_callback,
 813                        SERVICE_WORKER_ERROR_FAILED));
 814   }
 815 }
 816
 817 void ServiceWorkerVersion::DispatchSyncEvent(SyncRegistrationPtr registration,
 818                                              const StatusCallback& callback) {
 819   OnBeginEvent();
 820   DCHECK_EQ(ACTIVATED, status()) << status();
 821   if (running_status() != RUNNING) {
 822     // Schedule calling this method after starting the worker.
 823     StartWorker(base::Bind(
 824         &RunTaskAfterStartWorker, weak_factory_.GetWeakPtr(), callback,
 825         base::Bind(&self::DispatchSyncEvent, weak_factory_.GetWeakPtr(),
 826                    base::Passed(registration.Pass()), callback)));
 827     return;
 828   }
 829
 830   int request_id = AddRequest(callback, &sync_requests_, REQUEST_SYNC);
 831   if (!background_sync_dispatcher_) {
 832     embedded_worker_->GetServiceRegistry()->ConnectToRemoteService(
 833         mojo::GetProxy(&background_sync_dispatcher_));
 834     background_sync_dispatcher_.set_connection_error_handler(base::Bind(
 835         &ServiceWorkerVersion::OnBackgroundSyncDispatcherConnectionError,
 836         weak_factory_.GetWeakPtr()));
 837   }
 838
 839   background_sync_dispatcher_->Sync(
 840       registration.Pass(), base::Bind(&self::OnSyncEventFinished,
 841                                       weak_factory_.GetWeakPtr(), request_id));
 842 }
 843
 844 void ServiceWorkerVersion::DispatchNotificationClickEvent(
 845     const StatusCallback& callback,
 846     int64_t persistent_notification_id,
 847     const PlatformNotificationData& notification_data,
 848     int action_index) {
 849   OnBeginEvent();
 850   DCHECK_EQ(ACTIVATED, status()) << status();
 851   if (running_status() != RUNNING) {
 852     // Schedule calling this method after starting the worker.
 853     StartWorker(base::Bind(
 854         &RunTaskAfterStartWorker, weak_factory_.GetWeakPtr(), callback,
 855         base::Bind(&self::DispatchNotificationClickEvent,
 856                    weak_factory_.GetWeakPtr(), callback,
 857                    persistent_notification_id, notification_data,
 858                    action_index)));
 859     return;
 860   }
 861
 862   int request_id = AddRequest(callback, &notification_click_requests_,
 863                               REQUEST_NOTIFICATION_CLICK);
 864   ServiceWorkerStatusCode status =
 865       embedded_worker_->SendMessage(ServiceWorkerMsg_NotificationClickEvent(
 866           request_id, persistent_notification_id, notification_data,
 867           action_index));
 868   if (status != SERVICE_WORKER_OK) {
 869     notification_click_requests_.Remove(request_id);
 870     RunSoon(base::Bind(callback, status));
 871   }
 872 }
 873
 874 void ServiceWorkerVersion::DispatchPushEvent(const StatusCallback& callback,
 875                                              const std::string& data) {
 876   OnBeginEvent();
 877   DCHECK_EQ(ACTIVATED, status()) << status();
 878   if (running_status() != RUNNING) {
 879     // Schedule calling this method after starting the worker.
 880     StartWorker(base::Bind(&RunTaskAfterStartWorker,
 881                            weak_factory_.GetWeakPtr(), callback,
 882                            base::Bind(&self::DispatchPushEvent,
 883                                       weak_factory_.GetWeakPtr(),
 884                                       callback, data)));
 885     return;
 886   }
 887
 888   int request_id = AddRequest(callback, &push_requests_, REQUEST_PUSH);
 889   ServiceWorkerStatusCode status = embedded_worker_->SendMessage(
 890       ServiceWorkerMsg_PushEvent(request_id, data));
 891   if (status != SERVICE_WORKER_OK) {
 892     push_requests_.Remove(request_id);
 893     RunSoon(base::Bind(callback, status));
 894   }
 895 }
 896
 897 void ServiceWorkerVersion::DispatchGeofencingEvent(
 898     const StatusCallback& callback,
 899     blink::WebGeofencingEventType event_type,
 900     const std::string& region_id,
 901     const blink::WebCircularGeofencingRegion& region) {
 902   OnBeginEvent();
 903   DCHECK_EQ(ACTIVATED, status()) << status();
 904
 905   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
 906           switches::kEnableExperimentalWebPlatformFeatures)) {
 907     callback.Run(SERVICE_WORKER_ERROR_ABORT);
 908     return;
 909   }
 910
 911   if (running_status() != RUNNING) {
 912     // Schedule calling this method after starting the worker.
 913     StartWorker(base::Bind(&RunTaskAfterStartWorker,
 914                            weak_factory_.GetWeakPtr(),
 915                            callback,
 916                            base::Bind(&self::DispatchGeofencingEvent,
 917                                       weak_factory_.GetWeakPtr(),
 918                                       callback,
 919                                       event_type,
 920                                       region_id,
 921                                       region)));
 922     return;
 923   }
 924
 925   int request_id =
 926       AddRequest(callback, &geofencing_requests_, REQUEST_GEOFENCING);
 927   ServiceWorkerStatusCode status =
 928       embedded_worker_->SendMessage(ServiceWorkerMsg_GeofencingEvent(
 929           request_id, event_type, region_id, region));
 930   if (status != SERVICE_WORKER_OK) {
 931     geofencing_requests_.Remove(request_id);
 932     RunSoon(base::Bind(callback, status));
 933   }
 934 }
 935
 936 void ServiceWorkerVersion::DispatchServicePortConnectEvent(
 937     const ServicePortConnectCallback& callback,
 938     const GURL& target_url,
 939     const GURL& origin,
 940     int port_id) {
 941   OnBeginEvent();
 942   DCHECK_EQ(ACTIVATED, status()) << status();
 943
 944   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
 945           switches::kEnableExperimentalWebPlatformFeatures)) {
 946     callback.Run(SERVICE_WORKER_ERROR_ABORT, false, base::string16(),
 947                  base::string16());
 948     return;
 949   }
 950
 951   if (running_status() != RUNNING) {
 952     // Schedule calling this method after starting the worker.
 953     StartWorker(
 954         base::Bind(&RunTaskAfterStartWorker, weak_factory_.GetWeakPtr(),
 955                    base::Bind(&RunErrorServicePortConnectCallback, callback),
 956                    base::Bind(&self::DispatchServicePortConnectEvent,
 957                               weak_factory_.GetWeakPtr(), callback, target_url,
 958                               origin, port_id)));
 959     return;
 960   }
 961
 962   int request_id = AddRequest(callback, &service_port_connect_requests_,
 963                               REQUEST_SERVICE_PORT_CONNECT);
 964   if (!service_port_dispatcher_) {
 965     embedded_worker_->GetServiceRegistry()->ConnectToRemoteService(
 966         mojo::GetProxy(&service_port_dispatcher_));
 967     service_port_dispatcher_.set_connection_error_handler(base::Bind(
 968         &ServiceWorkerVersion::OnServicePortDispatcherConnectionError,
 969         weak_factory_.GetWeakPtr()));
 970   }
 971   service_port_dispatcher_->Connect(
 972       mojo::String::From(target_url), mojo::String::From(origin), port_id,
 973       base::Bind(&ServiceWorkerVersion::OnServicePortConnectEventFinished,
 974                  weak_factory_.GetWeakPtr(), request_id));
 975 }
 976
 977 void ServiceWorkerVersion::DispatchCrossOriginMessageEvent(
 978     const NavigatorConnectClient& client,
 979     const base::string16& message,
 980     const std::vector<TransferredMessagePort>& sent_message_ports,
 981     const StatusCallback& callback) {
 982   OnBeginEvent();
 983   // Unlike in the case of DispatchMessageEvent, here the caller is assumed to
 984   // have already put all the sent message ports on hold. So no need to do that
 985   // here again.
 986
 987   if (running_status() != RUNNING) {
 988     // Schedule calling this method after starting the worker.
 989     StartWorker(base::Bind(
 990         &RunTaskAfterStartWorker, weak_factory_.GetWeakPtr(),
 991         base::Bind(&RunErrorMessageCallback, sent_message_ports, callback),
 992         base::Bind(&self::DispatchCrossOriginMessageEvent,
 993                    weak_factory_.GetWeakPtr(), client, message,
 994                    sent_message_ports, callback)));
 995     return;
 996   }
 997
 998   MessagePortMessageFilter* filter =
 999       embedded_worker_->message_port_message_filter();
1000   std::vector<int> new_routing_ids;
1001   filter->UpdateMessagePortsWithNewRoutes(sent_message_ports, &new_routing_ids);
1002   ServiceWorkerStatusCode status =
1003       embedded_worker_->SendMessage(ServiceWorkerMsg_CrossOriginMessageToWorker(
1004           client, message, sent_message_ports, new_routing_ids));
1005   RunSoon(base::Bind(callback, status));
1006 }
1007
1008 void ServiceWorkerVersion::AddControllee(
1009     ServiceWorkerProviderHost* provider_host) {
1010   const std::string& uuid = provider_host->client_uuid();
1011   CHECK(!provider_host->client_uuid().empty());
1012   DCHECK(!ContainsKey(controllee_map_, uuid));
1013   controllee_map_[uuid] = provider_host;
1014   // Keep the worker alive a bit longer right after a new controllee is added.
1015   RestartTick(&idle_time_);
1016   FOR_EACH_OBSERVER(Listener, listeners_,
1017                     OnControlleeAdded(this, provider_host));
1018 }
1019
1020 void ServiceWorkerVersion::RemoveControllee(
1021     ServiceWorkerProviderHost* provider_host) {
1022   const std::string& uuid = provider_host->client_uuid();
1023   DCHECK(ContainsKey(controllee_map_, uuid));
1024   controllee_map_.erase(uuid);
1025   FOR_EACH_OBSERVER(Listener, listeners_,
1026                     OnControlleeRemoved(this, provider_host));
1027   if (HasControllee())
1028     return;
1029   FOR_EACH_OBSERVER(Listener, listeners_, OnNoControllees(this));
1030 }
1031
1032 bool ServiceWorkerVersion::HasWindowClients() {
1033   return !GetWindowClientsInternal(false /* include_uncontrolled */).empty();
1034 }
1035
1036 void ServiceWorkerVersion::AddStreamingURLRequestJob(
1037     const ServiceWorkerURLRequestJob* request_job) {
1038   DCHECK(streaming_url_request_jobs_.find(request_job) ==
1039          streaming_url_request_jobs_.end());
1040   streaming_url_request_jobs_.insert(request_job);
1041 }
1042
1043 void ServiceWorkerVersion::RemoveStreamingURLRequestJob(
1044     const ServiceWorkerURLRequestJob* request_job) {
1045   streaming_url_request_jobs_.erase(request_job);
1046   if (is_redundant())
1047     StopWorkerIfIdle();
1048 }
1049
1050 void ServiceWorkerVersion::AddListener(Listener* listener) {
1051   listeners_.AddObserver(listener);
1052 }
1053
1054 void ServiceWorkerVersion::RemoveListener(Listener* listener) {
1055   listeners_.RemoveObserver(listener);
1056 }
1057
1058 void ServiceWorkerVersion::ReportError(ServiceWorkerStatusCode status,
1059                                        const std::string& status_message) {
1060   if (status_message.empty()) {
1061     OnReportException(base::UTF8ToUTF16(ServiceWorkerStatusToString(status)),
1062                       -1, -1, GURL());
1063   } else {
1064     OnReportException(base::UTF8ToUTF16(status_message), -1, -1, GURL());
1065   }
1066 }
1067
1068 void ServiceWorkerVersion::SetStartWorkerStatusCode(
1069     ServiceWorkerStatusCode status) {
1070   start_worker_status_ = status;
1071 }
1072
1073 void ServiceWorkerVersion::Doom() {
1074   DCHECK(!HasControllee());
1075   SetStatus(REDUNDANT);
1076   if (running_status() == STARTING || running_status() == RUNNING)
1077     embedded_worker_->Stop();
1078   if (!context_)
1079     return;
1080   std::vector<ServiceWorkerDatabase::ResourceRecord> resources;
1081   script_cache_map_.GetResources(&resources);
1082   context_->storage()->PurgeResources(resources);
1083 }
1084
1085 void ServiceWorkerVersion::SetDevToolsAttached(bool attached) {
1086   embedded_worker()->set_devtools_attached(attached);
1087   if (attached) {
1088     // TODO(falken): Canceling the timeouts when debugging could cause
1089     // heisenbugs; we should instead run them as normal show an educational
1090     // message in DevTools when they occur. crbug.com/470419
1091
1092     // Don't record the startup time metric once DevTools is attached.
1093     ClearTick(&start_time_);
1094     skip_recording_startup_time_ = true;
1095
1096     // Cancel request timeouts.
1097     SetAllRequestTimes(base::TimeTicks());
1098     return;
1099   }
1100   if (!start_callbacks_.empty()) {
1101     // Reactivate the timer for start timeout.
1102     DCHECK(timeout_timer_.IsRunning());
1103     DCHECK(running_status() == STARTING || running_status() == STOPPING)
1104         << running_status();
1105     RestartTick(&start_time_);
1106   }
1107
1108   // Reactivate request timeouts.
1109   SetAllRequestTimes(base::TimeTicks::Now());
1110 }
1111
1112 void ServiceWorkerVersion::SetMainScriptHttpResponseInfo(
1113     const net::HttpResponseInfo& http_info) {
1114   main_script_http_info_.reset(new net::HttpResponseInfo(http_info));
1115   FOR_EACH_OBSERVER(Listener, listeners_,
1116                     OnMainScriptHttpResponseInfoSet(this));
1117 }
1118
1119 void ServiceWorkerVersion::SimulatePingTimeoutForTesting() {
1120   ping_controller_->SimulateTimeoutForTesting();
1121 }
1122
1123 const net::HttpResponseInfo*
1124 ServiceWorkerVersion::GetMainScriptHttpResponseInfo() {
1125   return main_script_http_info_.get();
1126 }
1127
1128 ServiceWorkerVersion::RequestInfo::RequestInfo(int id,
1129                                                RequestType type,
1130                                                const base::TimeTicks& now)
1131     : id(id), type(type), time(now) {
1132 }
1133
1134 ServiceWorkerVersion::RequestInfo::~RequestInfo() {
1135 }
1136
1137 template <typename CallbackType>
1138 ServiceWorkerVersion::PendingRequest<CallbackType>::PendingRequest(
1139     const CallbackType& callback,
1140     const base::TimeTicks& time)
1141     : callback(callback), start_time(time) {
1142 }
1143
1144 template <typename CallbackType>
1145 ServiceWorkerVersion::PendingRequest<CallbackType>::~PendingRequest() {
1146 }
1147
1148 void ServiceWorkerVersion::OnScriptLoaded() {
1149   if (running_status() == STOPPING)
1150     return;
1151   DCHECK_EQ(STARTING, running_status());
1152   // Activate ping/pong now that JavaScript execution will start.
1153   ping_controller_->Activate();
1154 }
1155
1156 void ServiceWorkerVersion::OnStarting() {
1157   FOR_EACH_OBSERVER(Listener, listeners_, OnRunningStateChanged(this));
1158 }
1159
1160 void ServiceWorkerVersion::OnStarted() {
1161   DCHECK_EQ(RUNNING, running_status());
1162   RestartTick(&idle_time_);
1163
1164   // Fire all start callbacks.
1165   scoped_refptr<ServiceWorkerVersion> protect(this);
1166   RunCallbacks(this, &start_callbacks_, SERVICE_WORKER_OK);
1167   FOR_EACH_OBSERVER(Listener, listeners_, OnRunningStateChanged(this));
1168 }
1169
1170 void ServiceWorkerVersion::OnStopping() {
1171   metrics_->NotifyStopping();
1172   RestartTick(&stop_time_);
1173   FOR_EACH_OBSERVER(Listener, listeners_, OnRunningStateChanged(this));
1174 }
1175
1176 void ServiceWorkerVersion::OnStopped(
1177     EmbeddedWorkerInstance::Status old_status) {
1178   metrics_->NotifyStopped();
1179   if (!stop_time_.is_null())
1180     ServiceWorkerMetrics::RecordStopWorkerTime(GetTickDuration(stop_time_));
1181
1182   OnStoppedInternal(old_status);
1183 }
1184
1185 void ServiceWorkerVersion::OnDetached(
1186     EmbeddedWorkerInstance::Status old_status) {
1187   OnStoppedInternal(old_status);
1188 }
1189
1190 void ServiceWorkerVersion::OnReportException(
1191     const base::string16& error_message,
1192     int line_number,
1193     int column_number,
1194     const GURL& source_url) {
1195   FOR_EACH_OBSERVER(
1196       Listener,
1197       listeners_,
1198       OnErrorReported(
1199           this, error_message, line_number, column_number, source_url));
1200 }
1201
1202 void ServiceWorkerVersion::OnReportConsoleMessage(int source_identifier,
1203                                                   int message_level,
1204                                                   const base::string16& message,
1205                                                   int line_number,
1206                                                   const GURL& source_url) {
1207   FOR_EACH_OBSERVER(Listener,
1208                     listeners_,
1209                     OnReportConsoleMessage(this,
1210                                            source_identifier,
1211                                            message_level,
1212                                            message,
1213                                            line_number,
1214                                            source_url));
1215 }
1216
1217 bool ServiceWorkerVersion::OnMessageReceived(const IPC::Message& message) {
1218   bool handled = true;
1219   IPC_BEGIN_MESSAGE_MAP(ServiceWorkerVersion, message)
1220     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_GetClients,
1221                         OnGetClients)
1222     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_ActivateEventFinished,
1223                         OnActivateEventFinished)
1224     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_InstallEventFinished,
1225                         OnInstallEventFinished)
1226     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_FetchEventFinished,
1227                         OnFetchEventFinished)
1228     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_NotificationClickEventFinished,
1229                         OnNotificationClickEventFinished)
1230     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_PushEventFinished,
1231                         OnPushEventFinished)
1232     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_GeofencingEventFinished,
1233                         OnGeofencingEventFinished)
1234     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_OpenWindow,
1235                         OnOpenWindow)
1236     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_SetCachedMetadata,
1237                         OnSetCachedMetadata)
1238     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_ClearCachedMetadata,
1239                         OnClearCachedMetadata)
1240     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_PostMessageToClient,
1241                         OnPostMessageToClient)
1242     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_FocusClient,
1243                         OnFocusClient)
1244     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_NavigateClient, OnNavigateClient)
1245     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_SkipWaiting,
1246                         OnSkipWaiting)
1247     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_ClaimClients,
1248                         OnClaimClients)
1249     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_Pong, OnPongFromWorker)
1250     IPC_MESSAGE_UNHANDLED(handled = false)
1251   IPC_END_MESSAGE_MAP()
1252   return handled;
1253 }
1254
1255 void ServiceWorkerVersion::OnStartSentAndScriptEvaluated(
1256     ServiceWorkerStatusCode status) {
1257   if (status != SERVICE_WORKER_OK) {
1258     scoped_refptr<ServiceWorkerVersion> protect(this);
1259     RunCallbacks(this, &start_callbacks_,
1260                  DeduceStartWorkerFailureReason(status));
1261   }
1262 }
1263
1264 void ServiceWorkerVersion::DispatchInstallEventAfterStartWorker(
1265     const StatusCallback& callback) {
1266   DCHECK_EQ(RUNNING, running_status())
1267       << "Worker stopped too soon after it was started.";
1268
1269   int request_id = AddRequest(callback, &install_requests_, REQUEST_INSTALL);
1270   ServiceWorkerStatusCode status = embedded_worker_->SendMessage(
1271       ServiceWorkerMsg_InstallEvent(request_id));
1272   if (status != SERVICE_WORKER_OK) {
1273     install_requests_.Remove(request_id);
1274     RunSoon(base::Bind(callback, status));
1275   }
1276 }
1277
1278 void ServiceWorkerVersion::DispatchActivateEventAfterStartWorker(
1279     const StatusCallback& callback) {
1280   DCHECK_EQ(RUNNING, running_status())
1281       << "Worker stopped too soon after it was started.";
1282
1283   int request_id = AddRequest(callback, &activate_requests_, REQUEST_ACTIVATE);
1284   ServiceWorkerStatusCode status =
1285       embedded_worker_->SendMessage(ServiceWorkerMsg_ActivateEvent(request_id));
1286   if (status != SERVICE_WORKER_OK) {
1287     activate_requests_.Remove(request_id);
1288     RunSoon(base::Bind(callback, status));
1289   }
1290 }
1291
1292 void ServiceWorkerVersion::OnGetClients(
1293     int request_id,
1294     const ServiceWorkerClientQueryOptions& options) {
1295   TRACE_EVENT_ASYNC_BEGIN2(
1296       "ServiceWorker", "ServiceWorkerVersion::OnGetClients", request_id,
1297       "client_type", options.client_type, "include_uncontrolled",
1298       options.include_uncontrolled);
1299
1300   ServiceWorkerClients clients;
1301   if (controllee_map_.empty() && !options.include_uncontrolled) {
1302     OnGetClientsFinished(request_id, &clients);
1303     return;
1304   }
1305
1306   // For Window clients we want to query the info on the UI thread first.
1307   if (options.client_type == blink::WebServiceWorkerClientTypeWindow ||
1308       options.client_type == blink::WebServiceWorkerClientTypeAll) {
1309     GetWindowClients(request_id, options);
1310     return;
1311   }
1312
1313   GetNonWindowClients(request_id, options, &clients);
1314   OnGetClientsFinished(request_id, &clients);
1315 }
1316
1317 void ServiceWorkerVersion::OnGetClientsFinished(int request_id,
1318                                                 ServiceWorkerClients* clients) {
1319   DCHECK_CURRENTLY_ON(BrowserThread::IO);
1320   TRACE_EVENT_ASYNC_END1("ServiceWorker", "ServiceWorkerVersion::OnGetClients",
1321                          request_id, "The number of clients", clients->size());
1322
1323   if (running_status() != RUNNING)
1324     return;
1325   // Sort clients so that the most recently active tab is in the front.
1326   std::sort(clients->begin(), clients->end(), ServiceWorkerClientInfoSortMRU());
1327   embedded_worker_->SendMessage(
1328       ServiceWorkerMsg_DidGetClients(request_id, *clients));
1329 }
1330
1331 void ServiceWorkerVersion::OnActivateEventFinished(
1332     int request_id,
1333     blink::WebServiceWorkerEventResult result) {
1334   DCHECK(ACTIVATING == status() ||
1335          REDUNDANT == status()) << status();
1336   TRACE_EVENT0("ServiceWorker",
1337                "ServiceWorkerVersion::OnActivateEventFinished");
1338
1339   PendingRequest<StatusCallback>* request =
1340       activate_requests_.Lookup(request_id);
1341   if (!request) {
1342     NOTREACHED() << "Got unexpected message: " << request_id;
1343     return;
1344   }
1345   ServiceWorkerStatusCode rv = SERVICE_WORKER_OK;
1346   if (result == blink::WebServiceWorkerEventResultRejected)
1347     rv = SERVICE_WORKER_ERROR_ACTIVATE_WORKER_FAILED;
1348
1349   UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.ActivateEvent.Time",
1350                              base::TimeTicks::Now() - request->start_time);
1351
1352   scoped_refptr<ServiceWorkerVersion> protect(this);
1353   request->callback.Run(rv);
1354   RemoveCallbackAndStopIfRedundant(&activate_requests_, request_id);
1355 }
1356
1357 void ServiceWorkerVersion::OnInstallEventFinished(
1358     int request_id,
1359     blink::WebServiceWorkerEventResult result) {
1360   // Status is REDUNDANT if the worker was doomed while handling the install
1361   // event, and finished handling before being terminated.
1362   DCHECK(status() == INSTALLING || status() == REDUNDANT) << status();
1363   TRACE_EVENT0("ServiceWorker",
1364                "ServiceWorkerVersion::OnInstallEventFinished");
1365
1366   PendingRequest<StatusCallback>* request =
1367       install_requests_.Lookup(request_id);
1368   if (!request) {
1369     NOTREACHED() << "Got unexpected message: " << request_id;
1370     return;
1371   }
1372   ServiceWorkerStatusCode status = SERVICE_WORKER_OK;
1373   if (result == blink::WebServiceWorkerEventResultRejected)
1374     status = SERVICE_WORKER_ERROR_INSTALL_WORKER_FAILED;
1375
1376   UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.InstallEvent.Time",
1377                              base::TimeTicks::Now() - request->start_time);
1378
1379   scoped_refptr<ServiceWorkerVersion> protect(this);
1380   request->callback.Run(status);
1381   RemoveCallbackAndStopIfRedundant(&install_requests_, request_id);
1382 }
1383
1384 void ServiceWorkerVersion::OnFetchEventFinished(
1385     int request_id,
1386     ServiceWorkerFetchEventResult result,
1387     const ServiceWorkerResponse& response) {
1388   TRACE_EVENT1("ServiceWorker",
1389                "ServiceWorkerVersion::OnFetchEventFinished",
1390                "Request id", request_id);
1391   PendingRequest<FetchCallback>* request = fetch_requests_.Lookup(request_id);
1392   if (!request) {
1393     NOTREACHED() << "Got unexpected message: " << request_id;
1394     return;
1395   }
1396
1397   // TODO(kinuko): Record other event statuses too.
1398   const bool handled = (result == SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE);
1399   metrics_->RecordEventHandledStatus(ServiceWorkerMetrics::EVENT_TYPE_FETCH,
1400                                      handled);
1401
1402   ServiceWorkerMetrics::RecordFetchEventTime(
1403       result, base::TimeTicks::Now() - request->start_time);
1404
1405   scoped_refptr<ServiceWorkerVersion> protect(this);
1406   request->callback.Run(SERVICE_WORKER_OK, result, response);
1407   RemoveCallbackAndStopIfRedundant(&fetch_requests_, request_id);
1408 }
1409
1410 void ServiceWorkerVersion::OnSyncEventFinished(
1411     int request_id,
1412     ServiceWorkerEventStatus status) {
1413   TRACE_EVENT1("ServiceWorker",
1414                "ServiceWorkerVersion::OnSyncEventFinished",
1415                "Request id", request_id);
1416   PendingRequest<StatusCallback>* request = sync_requests_.Lookup(request_id);
1417   if (!request) {
1418     NOTREACHED() << "Got unexpected message: " << request_id;
1419     return;
1420   }
1421
1422   scoped_refptr<ServiceWorkerVersion> protect(this);
1423   request->callback.Run(mojo::ConvertTo<ServiceWorkerStatusCode>(status));
1424   RemoveCallbackAndStopIfRedundant(&sync_requests_, request_id);
1425 }
1426
1427 void ServiceWorkerVersion::OnNotificationClickEventFinished(
1428     int request_id) {
1429   TRACE_EVENT1("ServiceWorker",
1430                "ServiceWorkerVersion::OnNotificationClickEventFinished",
1431                "Request id", request_id);
1432   PendingRequest<StatusCallback>* request =
1433       notification_click_requests_.Lookup(request_id);
1434   if (!request) {
1435     NOTREACHED() << "Got unexpected message: " << request_id;
1436     return;
1437   }
1438
1439   UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.NotificationClickEvent.Time",
1440                              base::TimeTicks::Now() - request->start_time);
1441
1442   scoped_refptr<ServiceWorkerVersion> protect(this);
1443   request->callback.Run(SERVICE_WORKER_OK);
1444   RemoveCallbackAndStopIfRedundant(&notification_click_requests_, request_id);
1445 }
1446
1447 void ServiceWorkerVersion::OnPushEventFinished(
1448     int request_id,
1449     blink::WebServiceWorkerEventResult result) {
1450   TRACE_EVENT1("ServiceWorker",
1451                "ServiceWorkerVersion::OnPushEventFinished",
1452                "Request id", request_id);
1453   PendingRequest<StatusCallback>* request = push_requests_.Lookup(request_id);
1454   if (!request) {
1455     NOTREACHED() << "Got unexpected message: " << request_id;
1456     return;
1457   }
1458   ServiceWorkerStatusCode status = SERVICE_WORKER_OK;
1459   if (result == blink::WebServiceWorkerEventResultRejected)
1460     status = SERVICE_WORKER_ERROR_EVENT_WAITUNTIL_REJECTED;
1461
1462   UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.PushEvent.Time",
1463                              base::TimeTicks::Now() - request->start_time);
1464
1465   scoped_refptr<ServiceWorkerVersion> protect(this);
1466   request->callback.Run(status);
1467   RemoveCallbackAndStopIfRedundant(&push_requests_, request_id);
1468 }
1469
1470 void ServiceWorkerVersion::OnGeofencingEventFinished(int request_id) {
1471   TRACE_EVENT1("ServiceWorker",
1472                "ServiceWorkerVersion::OnGeofencingEventFinished",
1473                "Request id",
1474                request_id);
1475   PendingRequest<StatusCallback>* request =
1476       geofencing_requests_.Lookup(request_id);
1477   if (!request) {
1478     NOTREACHED() << "Got unexpected message: " << request_id;
1479     return;
1480   }
1481
1482   scoped_refptr<ServiceWorkerVersion> protect(this);
1483   request->callback.Run(SERVICE_WORKER_OK);
1484   RemoveCallbackAndStopIfRedundant(&geofencing_requests_, request_id);
1485 }
1486
1487 void ServiceWorkerVersion::OnServicePortConnectEventFinished(
1488     int request_id,
1489     ServicePortConnectResult result,
1490     const mojo::String& name,
1491     const mojo::String& data) {
1492   TRACE_EVENT1("ServiceWorker",
1493                "ServiceWorkerVersion::OnServicePortConnectEventFinished",
1494                "Request id", request_id);
1495   PendingRequest<ServicePortConnectCallback>* request =
1496       service_port_connect_requests_.Lookup(request_id);
1497   if (!request) {
1498     NOTREACHED() << "Got unexpected message: " << request_id;
1499     return;
1500   }
1501
1502   scoped_refptr<ServiceWorkerVersion> protect(this);
1503   request->callback.Run(SERVICE_WORKER_OK,
1504                         result == SERVICE_PORT_CONNECT_RESULT_ACCEPT,
1505                         name.To<base::string16>(), data.To<base::string16>());
1506   RemoveCallbackAndStopIfRedundant(&service_port_connect_requests_, request_id);
1507 }
1508
1509 void ServiceWorkerVersion::OnOpenWindow(int request_id, GURL url) {
1510   // Just abort if we are shutting down.
1511   if (!context_)
1512     return;
1513
1514   if (!url.is_valid()) {
1515     DVLOG(1) << "Received unexpected invalid URL from renderer process.";
1516     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
1517                             base::Bind(&KillEmbeddedWorkerProcess,
1518                                        embedded_worker_->process_id(),
1519                                        RESULT_CODE_KILLED_BAD_MESSAGE));
1520     return;
1521   }
1522
1523   // The renderer treats all URLs in the about: scheme as being about:blank.
1524   // Canonicalize about: URLs to about:blank.
1525   if (url.SchemeIs(url::kAboutScheme))
1526     url = GURL(url::kAboutBlankURL);
1527
1528   // Reject requests for URLs that the process is not allowed to access. It's
1529   // possible to receive such requests since the renderer-side checks are
1530   // slightly different. For example, the view-source scheme will not be
1531   // filtered out by Blink.
1532   if (!ChildProcessSecurityPolicyImpl::GetInstance()->CanRequestURL(
1533           embedded_worker_->process_id(), url)) {
1534     embedded_worker_->SendMessage(ServiceWorkerMsg_OpenWindowError(
1535         request_id, url.spec() + " cannot be opened."));
1536     return;
1537   }
1538
1539   BrowserThread::PostTask(
1540       BrowserThread::UI, FROM_HERE,
1541       base::Bind(&OpenWindowOnUI,
1542                  url,
1543                  script_url_,
1544                  embedded_worker_->process_id(),
1545                  make_scoped_refptr(context_->wrapper()),
1546                  base::Bind(&ServiceWorkerVersion::DidOpenWindow,
1547                             weak_factory_.GetWeakPtr(),
1548                             request_id)));
1549 }
1550
1551 void ServiceWorkerVersion::DidOpenWindow(int request_id,
1552                                          int render_process_id,
1553                                          int render_frame_id) {
1554   DCHECK_CURRENTLY_ON(BrowserThread::IO);
1555
1556   if (running_status() != RUNNING)
1557     return;
1558
1559   if (render_process_id == ChildProcessHost::kInvalidUniqueID &&
1560       render_frame_id == MSG_ROUTING_NONE) {
1561     embedded_worker_->SendMessage(ServiceWorkerMsg_OpenWindowError(
1562         request_id, "Something went wrong while trying to open the window."));
1563     return;
1564   }
1565
1566   for (auto it =
1567            context_->GetClientProviderHostIterator(script_url_.GetOrigin());
1568        !it->IsAtEnd(); it->Advance()) {
1569     ServiceWorkerProviderHost* provider_host = it->GetProviderHost();
1570     if (provider_host->process_id() != render_process_id ||
1571         provider_host->frame_id() != render_frame_id) {
1572       continue;
1573     }
1574     provider_host->GetWindowClientInfo(base::Bind(
1575         &ServiceWorkerVersion::OnOpenWindowFinished, weak_factory_.GetWeakPtr(),
1576         request_id, provider_host->client_uuid()));
1577     return;
1578   }
1579
1580   // If here, it means that no provider_host was found, in which case, the
1581   // renderer should still be informed that the window was opened.
1582   OnOpenWindowFinished(request_id, std::string(), ServiceWorkerClientInfo());
1583 }
1584
1585 void ServiceWorkerVersion::OnOpenWindowFinished(
1586     int request_id,
1587     const std::string& client_uuid,
1588     const ServiceWorkerClientInfo& client_info) {
1589   DCHECK_CURRENTLY_ON(BrowserThread::IO);
1590
1591   if (running_status() != RUNNING)
1592     return;
1593
1594   ServiceWorkerClientInfo client(client_info);
1595
1596   // If the |client_info| is empty, it means that the opened window wasn't
1597   // controlled but the action still succeeded. The renderer process is
1598   // expecting an empty client in such case.
1599   if (!client.IsEmpty())
1600     client.client_uuid = client_uuid;
1601
1602   embedded_worker_->SendMessage(ServiceWorkerMsg_OpenWindowResponse(
1603       request_id, client));
1604 }
1605
1606 void ServiceWorkerVersion::OnSetCachedMetadata(const GURL& url,
1607                                                const std::vector<char>& data) {
1608   int64 callback_id = base::TimeTicks::Now().ToInternalValue();
1609   TRACE_EVENT_ASYNC_BEGIN1("ServiceWorker",
1610                            "ServiceWorkerVersion::OnSetCachedMetadata",
1611                            callback_id, "URL", url.spec());
1612   script_cache_map_.WriteMetadata(
1613       url, data, base::Bind(&ServiceWorkerVersion::OnSetCachedMetadataFinished,
1614                             weak_factory_.GetWeakPtr(), callback_id));
1615 }
1616
1617 void ServiceWorkerVersion::OnSetCachedMetadataFinished(int64 callback_id,
1618                                                        int result) {
1619   TRACE_EVENT_ASYNC_END1("ServiceWorker",
1620                          "ServiceWorkerVersion::OnSetCachedMetadata",
1621                          callback_id, "result", result);
1622   FOR_EACH_OBSERVER(Listener, listeners_, OnCachedMetadataUpdated(this));
1623 }
1624
1625 void ServiceWorkerVersion::OnClearCachedMetadata(const GURL& url) {
1626   int64 callback_id = base::TimeTicks::Now().ToInternalValue();
1627   TRACE_EVENT_ASYNC_BEGIN1("ServiceWorker",
1628                            "ServiceWorkerVersion::OnClearCachedMetadata",
1629                            callback_id, "URL", url.spec());
1630   script_cache_map_.ClearMetadata(
1631       url, base::Bind(&ServiceWorkerVersion::OnClearCachedMetadataFinished,
1632                       weak_factory_.GetWeakPtr(), callback_id));
1633 }
1634
1635 void ServiceWorkerVersion::OnClearCachedMetadataFinished(int64 callback_id,
1636                                                          int result) {
1637   TRACE_EVENT_ASYNC_END1("ServiceWorker",
1638                          "ServiceWorkerVersion::OnClearCachedMetadata",
1639                          callback_id, "result", result);
1640   FOR_EACH_OBSERVER(Listener, listeners_, OnCachedMetadataUpdated(this));
1641 }
1642
1643 void ServiceWorkerVersion::OnPostMessageToClient(
1644     const std::string& client_uuid,
1645     const base::string16& message,
1646     const std::vector<TransferredMessagePort>& sent_message_ports) {
1647   if (!context_)
1648     return;
1649   TRACE_EVENT1("ServiceWorker",
1650                "ServiceWorkerVersion::OnPostMessageToDocument",
1651                "Client id", client_uuid);
1652   ServiceWorkerProviderHost* provider_host =
1653       context_->GetProviderHostByClientID(client_uuid);
1654   if (!provider_host) {
1655     // The client may already have been closed, just ignore.
1656     return;
1657   }
1658   if (provider_host->document_url().GetOrigin() != script_url_.GetOrigin()) {
1659     // The client does not belong to the same origin as this ServiceWorker,
1660     // possibly due to timing issue or bad message.
1661     return;
1662   }
1663   provider_host->PostMessage(this, message, sent_message_ports);
1664 }
1665
1666 void ServiceWorkerVersion::OnFocusClient(int request_id,
1667                                          const std::string& client_uuid) {
1668   if (!context_)
1669     return;
1670   TRACE_EVENT2("ServiceWorker",
1671                "ServiceWorkerVersion::OnFocusClient",
1672                "Request id", request_id,
1673                "Client id", client_uuid);
1674   ServiceWorkerProviderHost* provider_host =
1675       context_->GetProviderHostByClientID(client_uuid);
1676   if (!provider_host) {
1677     // The client may already have been closed, just ignore.
1678     return;
1679   }
1680   if (provider_host->document_url().GetOrigin() != script_url_.GetOrigin()) {
1681     // The client does not belong to the same origin as this ServiceWorker,
1682     // possibly due to timing issue or bad message.
1683     return;
1684   }
1685   provider_host->Focus(base::Bind(&ServiceWorkerVersion::OnFocusClientFinished,
1686                                   weak_factory_.GetWeakPtr(), request_id,
1687                                   client_uuid));
1688 }
1689
1690 void ServiceWorkerVersion::OnFocusClientFinished(
1691     int request_id,
1692     const std::string& client_uuid,
1693     const ServiceWorkerClientInfo& client) {
1694   DCHECK_CURRENTLY_ON(BrowserThread::IO);
1695
1696   if (running_status() != RUNNING)
1697     return;
1698
1699   ServiceWorkerClientInfo client_info(client);
1700   client_info.client_uuid = client_uuid;
1701
1702   embedded_worker_->SendMessage(ServiceWorkerMsg_FocusClientResponse(
1703       request_id, client_info));
1704 }
1705
1706 void ServiceWorkerVersion::OnNavigateClient(int request_id,
1707                                             const std::string& client_uuid,
1708                                             const GURL& url) {
1709   if (!context_)
1710     return;
1711
1712   TRACE_EVENT2("ServiceWorker", "ServiceWorkerVersion::OnNavigateClient",
1713                "Request id", request_id, "Client id", client_uuid);
1714
1715   if (!url.is_valid() || !base::IsValidGUID(client_uuid)) {
1716     DVLOG(1) << "Received unexpected invalid URL/UUID from renderer process.";
1717     BrowserThread::PostTask(
1718         BrowserThread::UI, FROM_HERE,
1719         base::Bind(&KillEmbeddedWorkerProcess, embedded_worker_->process_id(),
1720                    RESULT_CODE_KILLED_BAD_MESSAGE));
1721     return;
1722   }
1723
1724   // Reject requests for URLs that the process is not allowed to access. It's
1725   // possible to receive such requests since the renderer-side checks are
1726   // slightly different. For example, the view-source scheme will not be
1727   // filtered out by Blink.
1728   if (!ChildProcessSecurityPolicyImpl::GetInstance()->CanRequestURL(
1729           embedded_worker_->process_id(), url)) {
1730     embedded_worker_->SendMessage(
1731         ServiceWorkerMsg_NavigateClientError(request_id, url));
1732     return;
1733   }
1734
1735   ServiceWorkerProviderHost* provider_host =
1736       context_->GetProviderHostByClientID(client_uuid);
1737   if (!provider_host || provider_host->active_version() != this) {
1738     embedded_worker_->SendMessage(
1739         ServiceWorkerMsg_NavigateClientError(request_id, url));
1740     return;
1741   }
1742
1743   BrowserThread::PostTask(
1744       BrowserThread::UI, FROM_HERE,
1745       base::Bind(&NavigateClientOnUI, url, script_url_,
1746                  provider_host->process_id(), provider_host->frame_id(),
1747                  base::Bind(&ServiceWorkerVersion::DidNavigateClient,
1748                             weak_factory_.GetWeakPtr(), request_id)));
1749 }
1750
1751 void ServiceWorkerVersion::DidNavigateClient(int request_id,
1752                                              int render_process_id,
1753                                              int render_frame_id) {
1754   DCHECK_CURRENTLY_ON(BrowserThread::IO);
1755
1756   if (running_status() != RUNNING)
1757     return;
1758
1759   if (render_process_id == ChildProcessHost::kInvalidUniqueID &&
1760       render_frame_id == MSG_ROUTING_NONE) {
1761     embedded_worker_->SendMessage(
1762         ServiceWorkerMsg_NavigateClientError(request_id, GURL()));
1763     return;
1764   }
1765
1766   for (auto it =
1767            context_->GetClientProviderHostIterator(script_url_.GetOrigin());
1768        !it->IsAtEnd(); it->Advance()) {
1769     ServiceWorkerProviderHost* provider_host = it->GetProviderHost();
1770     if (provider_host->process_id() != render_process_id ||
1771         provider_host->frame_id() != render_frame_id) {
1772       continue;
1773     }
1774     provider_host->GetWindowClientInfo(base::Bind(
1775         &ServiceWorkerVersion::OnNavigateClientFinished,
1776         weak_factory_.GetWeakPtr(), request_id, provider_host->client_uuid()));
1777     return;
1778   }
1779
1780   OnNavigateClientFinished(request_id, std::string(),
1781                            ServiceWorkerClientInfo());
1782 }
1783
1784 void ServiceWorkerVersion::OnNavigateClientFinished(
1785     int request_id,
1786     const std::string& client_uuid,
1787     const ServiceWorkerClientInfo& client_info) {
1788   DCHECK_CURRENTLY_ON(BrowserThread::IO);
1789
1790   if (running_status() != RUNNING)
1791     return;
1792
1793   ServiceWorkerClientInfo client(client_info);
1794
1795   // If the |client_info| is empty, it means that the navigated client wasn't
1796   // controlled but the action still succeeded. The renderer process is
1797   // expecting an empty client in such case.
1798   if (!client.IsEmpty())
1799     client.client_uuid = client_uuid;
1800
1801   embedded_worker_->SendMessage(
1802       ServiceWorkerMsg_NavigateClientResponse(request_id, client));
1803 }
1804
1805 void ServiceWorkerVersion::OnSkipWaiting(int request_id) {
1806   skip_waiting_ = true;
1807   if (status_ != INSTALLED)
1808     return DidSkipWaiting(request_id);
1809
1810   if (!context_)
1811     return;
1812   ServiceWorkerRegistration* registration =
1813       context_->GetLiveRegistration(registration_id_);
1814   if (!registration)
1815     return;
1816   pending_skip_waiting_requests_.push_back(request_id);
1817   if (pending_skip_waiting_requests_.size() == 1)
1818     registration->ActivateWaitingVersionWhenReady();
1819 }
1820
1821 void ServiceWorkerVersion::DidSkipWaiting(int request_id) {
1822   if (running_status() == STARTING || running_status() == RUNNING)
1823     embedded_worker_->SendMessage(ServiceWorkerMsg_DidSkipWaiting(request_id));
1824 }
1825
1826 void ServiceWorkerVersion::OnClaimClients(int request_id) {
1827   if (status_ != ACTIVATING && status_ != ACTIVATED) {
1828     embedded_worker_->SendMessage(ServiceWorkerMsg_ClaimClientsError(
1829         request_id, blink::WebServiceWorkerError::ErrorTypeState,
1830         base::ASCIIToUTF16(kClaimClientsStateErrorMesage)));
1831     return;
1832   }
1833   if (context_) {
1834     if (ServiceWorkerRegistration* registration =
1835             context_->GetLiveRegistration(registration_id_)) {
1836       registration->ClaimClients();
1837       embedded_worker_->SendMessage(
1838           ServiceWorkerMsg_DidClaimClients(request_id));
1839       return;
1840     }
1841   }
1842
1843   embedded_worker_->SendMessage(ServiceWorkerMsg_ClaimClientsError(
1844       request_id, blink::WebServiceWorkerError::ErrorTypeAbort,
1845       base::ASCIIToUTF16(kClaimClientsShutdownErrorMesage)));
1846 }
1847
1848 void ServiceWorkerVersion::OnPongFromWorker() {
1849   ping_controller_->OnPongReceived();
1850 }
1851
1852 void ServiceWorkerVersion::DidEnsureLiveRegistrationForStartWorker(
1853     const StatusCallback& callback,
1854     ServiceWorkerStatusCode status,
1855     const scoped_refptr<ServiceWorkerRegistration>& protect) {
1856   if (status != SERVICE_WORKER_OK) {
1857     RecordStartWorkerResult(status);
1858     RunSoon(base::Bind(callback, SERVICE_WORKER_ERROR_START_WORKER_FAILED));
1859     return;
1860   }
1861   if (is_redundant()) {
1862     RecordStartWorkerResult(SERVICE_WORKER_ERROR_REDUNDANT);
1863     RunSoon(base::Bind(callback, SERVICE_WORKER_ERROR_REDUNDANT));
1864     return;
1865   }
1866
1867   MarkIfStale();
1868
1869   switch (running_status()) {
1870     case RUNNING:
1871       RunSoon(base::Bind(callback, SERVICE_WORKER_OK));
1872       return;
1873     case STOPPING:
1874     case STOPPED:
1875     case STARTING:
1876       if (start_callbacks_.empty()) {
1877         start_callbacks_.push_back(
1878             base::Bind(&ServiceWorkerVersion::RecordStartWorkerResult,
1879                        weak_factory_.GetWeakPtr()));
1880       }
1881       // Keep the live registration while starting the worker.
1882       start_callbacks_.push_back(
1883           base::Bind(&RunStartWorkerCallback, callback, protect));
1884       StartWorkerInternal();
1885       return;
1886   }
1887 }
1888
1889 void ServiceWorkerVersion::StartWorkerInternal() {
1890   if (!metrics_)
1891     metrics_.reset(new Metrics(this));
1892
1893   if (!timeout_timer_.IsRunning())
1894     StartTimeoutTimer();
1895   if (running_status() == STOPPED) {
1896     embedded_worker_->Start(
1897         version_id_, scope_, script_url_,
1898         base::Bind(&ServiceWorkerVersion::OnStartSentAndScriptEvaluated,
1899                    weak_factory_.GetWeakPtr()));
1900   }
1901 }
1902
1903 void ServiceWorkerVersion::GetWindowClients(
1904     int request_id,
1905     const ServiceWorkerClientQueryOptions& options) {
1906   DCHECK(options.client_type == blink::WebServiceWorkerClientTypeWindow ||
1907          options.client_type == blink::WebServiceWorkerClientTypeAll);
1908   const std::vector<base::Tuple<int, int, std::string>>& clients_info =
1909       GetWindowClientsInternal(options.include_uncontrolled);
1910
1911   if (clients_info.empty()) {
1912     DidGetWindowClients(request_id, options,
1913                         make_scoped_ptr(new ServiceWorkerClients));
1914     return;
1915   }
1916
1917   BrowserThread::PostTask(
1918       BrowserThread::UI, FROM_HERE,
1919       base::Bind(&OnGetWindowClientsFromUI, clients_info, script_url_,
1920                  base::Bind(&ServiceWorkerVersion::DidGetWindowClients,
1921                             weak_factory_.GetWeakPtr(), request_id, options)));
1922 }
1923
1924 const std::vector<base::Tuple<int, int, std::string>>
1925 ServiceWorkerVersion::GetWindowClientsInternal(bool include_uncontrolled) {
1926   std::vector<base::Tuple<int, int, std::string>> clients_info;
1927   if (!include_uncontrolled) {
1928     for (auto& controllee : controllee_map_)
1929       AddWindowClient(controllee.second, &clients_info);
1930   } else {
1931     for (auto it =
1932              context_->GetClientProviderHostIterator(script_url_.GetOrigin());
1933          !it->IsAtEnd(); it->Advance()) {
1934       AddWindowClient(it->GetProviderHost(), &clients_info);
1935     }
1936   }
1937   return clients_info;
1938 }
1939
1940 void ServiceWorkerVersion::DidGetWindowClients(
1941     int request_id,
1942     const ServiceWorkerClientQueryOptions& options,
1943     scoped_ptr<ServiceWorkerClients> clients) {
1944   DCHECK_CURRENTLY_ON(BrowserThread::IO);
1945   if (options.client_type == blink::WebServiceWorkerClientTypeAll)
1946     GetNonWindowClients(request_id, options, clients.get());
1947   OnGetClientsFinished(request_id, clients.get());
1948 }
1949
1950 void ServiceWorkerVersion::GetNonWindowClients(
1951     int request_id,
1952     const ServiceWorkerClientQueryOptions& options,
1953     ServiceWorkerClients* clients) {
1954   if (!options.include_uncontrolled) {
1955     for (auto& controllee : controllee_map_) {
1956       AddNonWindowClient(controllee.second, options, clients);
1957     }
1958   } else {
1959     for (auto it =
1960              context_->GetClientProviderHostIterator(script_url_.GetOrigin());
1961          !it->IsAtEnd(); it->Advance()) {
1962       AddNonWindowClient(it->GetProviderHost(), options, clients);
1963     }
1964   }
1965 }
1966
1967 void ServiceWorkerVersion::StartTimeoutTimer() {
1968   DCHECK(!timeout_timer_.IsRunning());
1969
1970   if (embedded_worker_->devtools_attached()) {
1971     // Don't record the startup time metric once DevTools is attached.
1972     ClearTick(&start_time_);
1973     skip_recording_startup_time_ = true;
1974   } else {
1975     RestartTick(&start_time_);
1976     skip_recording_startup_time_ = false;
1977   }
1978
1979   // The worker is starting up and not yet idle.
1980   ClearTick(&idle_time_);
1981
1982   // Ping will be activated in OnScriptLoaded.
1983   ping_controller_->Deactivate();
1984
1985   timeout_timer_.Start(FROM_HERE,
1986                        base::TimeDelta::FromSeconds(kTimeoutTimerDelaySeconds),
1987                        this, &ServiceWorkerVersion::OnTimeoutTimer);
1988 }
1989
1990 void ServiceWorkerVersion::StopTimeoutTimer() {
1991   timeout_timer_.Stop();
1992   ClearTick(&idle_time_);
1993
1994   // Trigger update if worker is stale.
1995   if (!in_dtor_ && !stale_time_.is_null()) {
1996     ClearTick(&stale_time_);
1997     if (!update_timer_.IsRunning())
1998       ScheduleUpdate();
1999   }
2000 }
2001
2002 void ServiceWorkerVersion::OnTimeoutTimer() {
2003   DCHECK(running_status() == STARTING || running_status() == RUNNING ||
2004          running_status() == STOPPING)
2005       << running_status();
2006
2007   MarkIfStale();
2008
2009   if (GetTickDuration(stop_time_) >
2010       base::TimeDelta::FromSeconds(kStopWorkerTimeoutSeconds)) {
2011     metrics_->NotifyStalledInStopping();
2012   }
2013
2014   // Trigger update if worker is stale and we waited long enough for it to go
2015   // idle.
2016   if (GetTickDuration(stale_time_) >
2017       base::TimeDelta::FromMinutes(kRequestTimeoutMinutes)) {
2018     ClearTick(&stale_time_);
2019     if (!update_timer_.IsRunning())
2020       ScheduleUpdate();
2021   }
2022
2023   // Starting a worker hasn't finished within a certain period.
2024   if (GetTickDuration(start_time_) >
2025       base::TimeDelta::FromMinutes(kStartWorkerTimeoutMinutes)) {
2026     DCHECK(running_status() == STARTING || running_status() == STOPPING)
2027         << running_status();
2028     scoped_refptr<ServiceWorkerVersion> protect(this);
2029     RunCallbacks(this, &start_callbacks_, SERVICE_WORKER_ERROR_TIMEOUT);
2030     if (running_status() == STARTING)
2031       embedded_worker_->Stop();
2032     return;
2033   }
2034
2035   // Requests have not finished within a certain period.
2036   bool request_timed_out = false;
2037   while (!requests_.empty()) {
2038     RequestInfo info = requests_.front();
2039     if (GetTickDuration(info.time) <
2040         base::TimeDelta::FromMinutes(kRequestTimeoutMinutes))
2041       break;
2042     if (MaybeTimeOutRequest(info)) {
2043       request_timed_out = true;
2044       UMA_HISTOGRAM_ENUMERATION("ServiceWorker.RequestTimeouts.Count",
2045                                 info.type, NUM_REQUEST_TYPES);
2046     }
2047     requests_.pop();
2048   }
2049   if (request_timed_out && running_status() != STOPPING)
2050     embedded_worker_->Stop();
2051
2052   // For the timeouts below, there are no callbacks to timeout so there is
2053   // nothing more to do if the worker is already stopping.
2054   if (running_status() == STOPPING)
2055     return;
2056
2057   // The worker has been idle for longer than a certain period.
2058   if (GetTickDuration(idle_time_) >
2059       base::TimeDelta::FromSeconds(kIdleWorkerTimeoutSeconds)) {
2060     StopWorkerIfIdle();
2061     return;
2062   }
2063
2064   // Check ping status.
2065   ping_controller_->CheckPingStatus();
2066 }
2067
2068 ServiceWorkerStatusCode ServiceWorkerVersion::PingWorker() {
2069   DCHECK(running_status() == STARTING || running_status() == RUNNING);
2070   return embedded_worker_->SendMessage(ServiceWorkerMsg_Ping());
2071 }
2072
2073 void ServiceWorkerVersion::OnPingTimeout() {
2074   DCHECK(running_status() == STARTING || running_status() == RUNNING);
2075   // TODO(falken): Show a message to the developer that the SW was stopped due
2076   // to timeout (crbug.com/457968). Also, change the error code to
2077   // SERVICE_WORKER_ERROR_TIMEOUT.
2078   StopWorkerIfIdle();
2079 }
2080
2081 void ServiceWorkerVersion::StopWorkerIfIdle() {
2082   if (HasInflightRequests() && !ping_controller_->IsTimedOut())
2083     return;
2084   if (running_status() == STOPPED || running_status() == STOPPING ||
2085       !stop_callbacks_.empty()) {
2086     return;
2087   }
2088
2089   // TODO(falken): We may need to handle StopIfIdle failure and
2090   // forcibly fail pending callbacks so no one is stuck waiting
2091   // for the worker.
2092   embedded_worker_->StopIfIdle();
2093 }
2094
2095 bool ServiceWorkerVersion::HasInflightRequests() const {
2096   return !activate_requests_.IsEmpty() || !install_requests_.IsEmpty() ||
2097          !fetch_requests_.IsEmpty() || !sync_requests_.IsEmpty() ||
2098          !notification_click_requests_.IsEmpty() || !push_requests_.IsEmpty() ||
2099          !geofencing_requests_.IsEmpty() ||
2100          !service_port_connect_requests_.IsEmpty() ||
2101          !streaming_url_request_jobs_.empty();
2102 }
2103
2104 void ServiceWorkerVersion::RecordStartWorkerResult(
2105     ServiceWorkerStatusCode status) {
2106   base::TimeTicks start_time = start_time_;
2107   ClearTick(&start_time_);
2108
2109   ServiceWorkerMetrics::RecordStartWorkerStatus(status,
2110                                                 IsInstalled(prestart_status_));
2111
2112   if (status == SERVICE_WORKER_OK && !start_time.is_null() &&
2113       !skip_recording_startup_time_) {
2114     ServiceWorkerMetrics::RecordStartWorkerTime(GetTickDuration(start_time),
2115                                                 IsInstalled(prestart_status_));
2116   }
2117
2118   if (status != SERVICE_WORKER_ERROR_TIMEOUT)
2119     return;
2120   EmbeddedWorkerInstance::StartingPhase phase =
2121       EmbeddedWorkerInstance::NOT_STARTING;
2122   EmbeddedWorkerInstance::Status running_status = embedded_worker_->status();
2123   // Build an artifical JavaScript exception to show in the ServiceWorker
2124   // log for developers; it's not user-facing so it's not a localized resource.
2125   std::string message = "ServiceWorker startup timed out. ";
2126   if (running_status != EmbeddedWorkerInstance::STARTING) {
2127     message.append("The worker had unexpected status: ");
2128     message.append(EmbeddedWorkerInstance::StatusToString(running_status));
2129   } else {
2130     phase = embedded_worker_->starting_phase();
2131     message.append("The worker was in startup phase: ");
2132     message.append(EmbeddedWorkerInstance::StartingPhaseToString(phase));
2133   }
2134   message.append(".");
2135   OnReportException(base::UTF8ToUTF16(message), -1, -1, GURL());
2136   DVLOG(1) << message;
2137   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.StartWorker.TimeoutPhase",
2138                             phase,
2139                             EmbeddedWorkerInstance::STARTING_PHASE_MAX_VALUE);
2140 }
2141
2142 template <typename IDMAP>
2143 void ServiceWorkerVersion::RemoveCallbackAndStopIfRedundant(IDMAP* callbacks,
2144                                                             int request_id) {
2145   RestartTick(&idle_time_);
2146   callbacks->Remove(request_id);
2147   if (is_redundant()) {
2148     // The stop should be already scheduled, but try to stop immediately, in
2149     // order to release worker resources soon.
2150     StopWorkerIfIdle();
2151   }
2152 }
2153
2154 template <typename CallbackType>
2155 int ServiceWorkerVersion::AddRequest(
2156     const CallbackType& callback,
2157     IDMap<PendingRequest<CallbackType>, IDMapOwnPointer>* callback_map,
2158     RequestType request_type) {
2159   base::TimeTicks now = base::TimeTicks::Now();
2160   int request_id =
2161       callback_map->Add(new PendingRequest<CallbackType>(callback, now));
2162   requests_.push(RequestInfo(request_id, request_type, now));
2163   return request_id;
2164 }
2165
2166 bool ServiceWorkerVersion::MaybeTimeOutRequest(const RequestInfo& info) {
2167   switch (info.type) {
2168     case REQUEST_ACTIVATE:
2169       return RunIDMapCallback(&activate_requests_, info.id,
2170                               SERVICE_WORKER_ERROR_TIMEOUT);
2171     case REQUEST_INSTALL:
2172       return RunIDMapCallback(&install_requests_, info.id,
2173                               SERVICE_WORKER_ERROR_TIMEOUT);
2174     case REQUEST_FETCH:
2175       return RunIDMapCallback(
2176           &fetch_requests_, info.id, SERVICE_WORKER_ERROR_TIMEOUT,
2177           /* The other args are ignored for non-OK status. */
2178           SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK, ServiceWorkerResponse());
2179     case REQUEST_SYNC:
2180       return RunIDMapCallback(&sync_requests_, info.id,
2181                               SERVICE_WORKER_ERROR_TIMEOUT);
2182     case REQUEST_NOTIFICATION_CLICK:
2183       return RunIDMapCallback(&notification_click_requests_, info.id,
2184                               SERVICE_WORKER_ERROR_TIMEOUT);
2185     case REQUEST_PUSH:
2186       return RunIDMapCallback(&push_requests_, info.id,
2187                               SERVICE_WORKER_ERROR_TIMEOUT);
2188     case REQUEST_GEOFENCING:
2189       return RunIDMapCallback(&geofencing_requests_, info.id,
2190                               SERVICE_WORKER_ERROR_TIMEOUT);
2191     case REQUEST_SERVICE_PORT_CONNECT:
2192       return RunIDMapCallback(&service_port_connect_requests_, info.id,
2193                               SERVICE_WORKER_ERROR_TIMEOUT,
2194                               false /* accept_connection */, base::string16(),
2195                               base::string16());
2196     case NUM_REQUEST_TYPES:
2197       break;
2198   }
2199   NOTREACHED() << "Got unexpected request type: " << info.type;
2200   return false;
2201 }
2202
2203 void ServiceWorkerVersion::SetAllRequestTimes(const base::TimeTicks& ticks) {
2204   std::queue<RequestInfo> new_requests;
2205   while (!requests_.empty()) {
2206     RequestInfo info = requests_.front();
2207     info.time = ticks;
2208     new_requests.push(info);
2209     requests_.pop();
2210   }
2211   requests_ = new_requests;
2212 }
2213
2214 ServiceWorkerStatusCode ServiceWorkerVersion::DeduceStartWorkerFailureReason(
2215     ServiceWorkerStatusCode default_code) {
2216   if (ping_controller_->IsTimedOut())
2217     return SERVICE_WORKER_ERROR_TIMEOUT;
2218
2219   if (start_worker_status_ != SERVICE_WORKER_OK)
2220     return start_worker_status_;
2221
2222   const net::URLRequestStatus& main_script_status =
2223       script_cache_map()->main_script_status();
2224   if (main_script_status.status() != net::URLRequestStatus::SUCCESS) {
2225     switch (main_script_status.error()) {
2226       case net::ERR_INSECURE_RESPONSE:
2227       case net::ERR_UNSAFE_REDIRECT:
2228         return SERVICE_WORKER_ERROR_SECURITY;
2229       case net::ERR_ABORTED:
2230         return SERVICE_WORKER_ERROR_ABORT;
2231       default:
2232         return SERVICE_WORKER_ERROR_NETWORK;
2233     }
2234   }
2235
2236   return default_code;
2237 }
2238
2239 void ServiceWorkerVersion::MarkIfStale() {
2240   if (!context_)
2241     return;
2242   if (update_timer_.IsRunning() || !stale_time_.is_null())
2243     return;
2244   ServiceWorkerRegistration* registration =
2245       context_->GetLiveRegistration(registration_id_);
2246   if (!registration || registration->active_version() != this)
2247     return;
2248   base::TimeDelta time_since_last_check =
2249       base::Time::Now() - registration->last_update_check();
2250   if (time_since_last_check >
2251       base::TimeDelta::FromHours(kServiceWorkerScriptMaxCacheAgeInHours))
2252     RestartTick(&stale_time_);
2253 }
2254
2255 void ServiceWorkerVersion::FoundRegistrationForUpdate(
2256     ServiceWorkerStatusCode status,
2257     const scoped_refptr<ServiceWorkerRegistration>& registration) {
2258   if (!context_)
2259     return;
2260
2261   const scoped_refptr<ServiceWorkerVersion> protect = this;
2262   if (is_update_scheduled_) {
2263     context_->UnprotectVersion(version_id_);
2264     is_update_scheduled_ = false;
2265   }
2266
2267   if (status != SERVICE_WORKER_OK || registration->active_version() != this)
2268     return;
2269   context_->UpdateServiceWorker(registration.get(),
2270                                 false /* force_bypass_cache */);
2271 }
2272
2273 void ServiceWorkerVersion::OnStoppedInternal(
2274     EmbeddedWorkerInstance::Status old_status) {
2275   DCHECK_EQ(STOPPED, running_status());
2276   scoped_refptr<ServiceWorkerVersion> protect;
2277   if (!in_dtor_)
2278     protect = this;
2279
2280   DCHECK(metrics_);
2281   metrics_.reset();
2282
2283   bool should_restart = !is_redundant() && !start_callbacks_.empty() &&
2284                         (old_status != EmbeddedWorkerInstance::STARTING) &&
2285                         !in_dtor_ && !ping_controller_->IsTimedOut();
2286
2287   ClearTick(&stop_time_);
2288   StopTimeoutTimer();
2289
2290   // Fire all stop callbacks.
2291   RunCallbacks(this, &stop_callbacks_, SERVICE_WORKER_OK);
2292
2293   if (!should_restart) {
2294     // Let all start callbacks fail.
2295     RunCallbacks(this, &start_callbacks_,
2296                  DeduceStartWorkerFailureReason(
2297                      SERVICE_WORKER_ERROR_START_WORKER_FAILED));
2298   }
2299
2300   // Let all message callbacks fail (this will also fire and clear all
2301   // callbacks for events).
2302   // TODO(kinuko): Consider if we want to add queue+resend mechanism here.
2303   RunIDMapCallbacks(&activate_requests_,
2304                     SERVICE_WORKER_ERROR_ACTIVATE_WORKER_FAILED);
2305   RunIDMapCallbacks(&install_requests_,
2306                     SERVICE_WORKER_ERROR_INSTALL_WORKER_FAILED);
2307   RunIDMapCallbacks(&fetch_requests_, SERVICE_WORKER_ERROR_FAILED,
2308                     SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK,
2309                     ServiceWorkerResponse());
2310   RunIDMapCallbacks(&sync_requests_, SERVICE_WORKER_ERROR_FAILED);
2311   RunIDMapCallbacks(&notification_click_requests_, SERVICE_WORKER_ERROR_FAILED);
2312   RunIDMapCallbacks(&push_requests_, SERVICE_WORKER_ERROR_FAILED);
2313   RunIDMapCallbacks(&geofencing_requests_, SERVICE_WORKER_ERROR_FAILED);
2314
2315   // Close all mojo services. This will also fire and clear all callbacks
2316   // for messages that are still outstanding for those services.
2317   OnServicePortDispatcherConnectionError();
2318
2319   OnBackgroundSyncDispatcherConnectionError();
2320
2321   streaming_url_request_jobs_.clear();
2322
2323   FOR_EACH_OBSERVER(Listener, listeners_, OnRunningStateChanged(this));
2324
2325   if (should_restart)
2326     StartWorkerInternal();
2327 }
2328
2329 void ServiceWorkerVersion::OnServicePortDispatcherConnectionError() {
2330   RunIDMapCallbacks(&service_port_connect_requests_,
2331                     SERVICE_WORKER_ERROR_FAILED, false, base::string16(),
2332                     base::string16());
2333   service_port_dispatcher_.reset();
2334 }
2335
2336 void ServiceWorkerVersion::OnBackgroundSyncDispatcherConnectionError() {
2337   RunIDMapCallbacks(&sync_requests_, SERVICE_WORKER_ERROR_FAILED);
2338   background_sync_dispatcher_.reset();
2339 }
2340
2341 void ServiceWorkerVersion::OnBeginEvent() {
2342   if (should_exclude_from_uma_ || running_status() != RUNNING ||
2343       idle_time_.is_null()) {
2344     return;
2345   }
2346   ServiceWorkerMetrics::RecordTimeBetweenEvents(base::TimeTicks::Now() -
2347                                                 idle_time_);
2348 }
2349
2350 }  // namespace content