content/child/resource_dispatcher.cc

   1 // Copyright (c) 2012 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 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
   6
   7 #include "content/child/resource_dispatcher.h"
   8
   9 #include "base/basictypes.h"
  10 #include "base/bind.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/debug/alias.h"
  13 #include "base/debug/dump_without_crashing.h"
  14 #include "base/files/file_path.h"
  15 #include "base/memory/shared_memory.h"
  16 #include "base/message_loop/message_loop.h"
  17 #include "base/metrics/histogram.h"
  18 #include "base/strings/string_util.h"
  19 #include "content/child/request_extra_data.h"
  20 #include "content/child/request_info.h"
  21 #include "content/child/shared_memory_received_data_factory.h"
  22 #include "content/child/site_isolation_stats_gatherer.h"
  23 #include "content/child/sync_load_response.h"
  24 #include "content/child/threaded_data_provider.h"
  25 #include "content/common/inter_process_time_ticks_converter.h"
  26 #include "content/common/resource_messages.h"
  27 #include "content/public/child/fixed_received_data.h"
  28 #include "content/public/child/request_peer.h"
  29 #include "content/public/child/resource_dispatcher_delegate.h"
  30 #include "content/public/common/resource_response.h"
  31 #include "content/public/common/resource_type.h"
  32 #include "net/base/net_errors.h"
  33 #include "net/base/net_util.h"
  34 #include "net/base/request_priority.h"
  35 #include "net/http/http_response_headers.h"
  36
  37 namespace content {
  38
  39 namespace {
  40
  41 // Converts |time| from a remote to local TimeTicks, overwriting the original
  42 // value.
  43 void RemoteToLocalTimeTicks(
  44     const InterProcessTimeTicksConverter& converter,
  45     base::TimeTicks* time) {
  46   RemoteTimeTicks remote_time = RemoteTimeTicks::FromTimeTicks(*time);
  47   *time = converter.ToLocalTimeTicks(remote_time).ToTimeTicks();
  48 }
  49
  50 void CrashOnMapFailure() {
  51 #if defined(OS_WIN)
  52   DWORD last_err = GetLastError();
  53   base::debug::Alias(&last_err);
  54 #endif
  55   CHECK(false);
  56 }
  57
  58 // Each resource request is assigned an ID scoped to this process.
  59 int MakeRequestID() {
  60   // NOTE: The resource_dispatcher_host also needs probably unique
  61   // request_ids, so they count down from -2 (-1 is a special we're
  62   // screwed value), while the renderer process counts up.
  63   static int next_request_id = 0;
  64   return next_request_id++;
  65 }
  66
  67 }  // namespace
  68
  69 ResourceDispatcher::ResourceDispatcher(
  70     IPC::Sender* sender,
  71     scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner)
  72     : message_sender_(sender),
  73       delegate_(NULL),
  74       io_timestamp_(base::TimeTicks()),
  75       main_thread_task_runner_(main_thread_task_runner),
  76       weak_factory_(this) {
  77 }
  78
  79 ResourceDispatcher::~ResourceDispatcher() {
  80 }
  81
  82 bool ResourceDispatcher::OnMessageReceived(const IPC::Message& message) {
  83   if (!IsResourceDispatcherMessage(message)) {
  84     return false;
  85   }
  86
  87   int request_id;
  88
  89   base::PickleIterator iter(message);
  90   if (!iter.ReadInt(&request_id)) {
  91     NOTREACHED() << "malformed resource message";
  92     return true;
  93   }
  94
  95   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
  96   if (!request_info) {
  97     // Release resources in the message if it is a data message.
  98     ReleaseResourcesInDataMessage(message);
  99     return true;
 100   }
 101
 102   if (request_info->is_deferred) {
 103     request_info->deferred_message_queue.push_back(new IPC::Message(message));
 104     return true;
 105   }
 106   // Make sure any deferred messages are dispatched before we dispatch more.
 107   if (!request_info->deferred_message_queue.empty()) {
 108     FlushDeferredMessages(request_id);
 109     // The request could have been deferred now. If yes then the current
 110     // message has to be queued up. The request_info instance should remain
 111     // valid here as there are pending messages for it.
 112     DCHECK(pending_requests_.find(request_id) != pending_requests_.end());
 113     if (request_info->is_deferred) {
 114       request_info->deferred_message_queue.push_back(new IPC::Message(message));
 115       return true;
 116     }
 117   }
 118
 119   DispatchMessage(message);
 120   return true;
 121 }
 122
 123 ResourceDispatcher::PendingRequestInfo*
 124 ResourceDispatcher::GetPendingRequestInfo(int request_id) {
 125   PendingRequestList::iterator it = pending_requests_.find(request_id);
 126   if (it == pending_requests_.end()) {
 127     // This might happen for kill()ed requests on the webkit end.
 128     return NULL;
 129   }
 130   return &(it->second);
 131 }
 132
 133 void ResourceDispatcher::OnUploadProgress(int request_id, int64 position,
 134                                           int64 size) {
 135   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 136   if (!request_info)
 137     return;
 138
 139   request_info->peer->OnUploadProgress(position, size);
 140
 141   // Acknowledge receipt
 142   message_sender_->Send(new ResourceHostMsg_UploadProgress_ACK(request_id));
 143 }
 144
 145 void ResourceDispatcher::OnReceivedResponse(
 146     int request_id, const ResourceResponseHead& response_head) {
 147   TRACE_EVENT0("loader", "ResourceDispatcher::OnReceivedResponse");
 148   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 149   if (!request_info)
 150     return;
 151   request_info->response_start = ConsumeIOTimestamp();
 152
 153   if (delegate_) {
 154     RequestPeer* new_peer =
 155         delegate_->OnReceivedResponse(
 156             request_info->peer, response_head.mime_type, request_info->url);
 157     if (new_peer)
 158       request_info->peer = new_peer;
 159   }
 160
 161   ResourceResponseInfo renderer_response_info;
 162   ToResourceResponseInfo(*request_info, response_head, &renderer_response_info);
 163   request_info->site_isolation_metadata =
 164       SiteIsolationStatsGatherer::OnReceivedResponse(
 165           request_info->frame_origin, request_info->response_url,
 166           request_info->resource_type, request_info->origin_pid,
 167           renderer_response_info);
 168   request_info->peer->OnReceivedResponse(renderer_response_info);
 169 }
 170
 171 void ResourceDispatcher::OnReceivedCachedMetadata(
 172       int request_id, const std::vector<char>& data) {
 173   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 174   if (!request_info)
 175     return;
 176
 177   if (data.size())
 178     request_info->peer->OnReceivedCachedMetadata(&data.front(), data.size());
 179 }
 180
 181 void ResourceDispatcher::OnSetDataBuffer(int request_id,
 182                                          base::SharedMemoryHandle shm_handle,
 183                                          int shm_size,
 184                                          base::ProcessId renderer_pid) {
 185   TRACE_EVENT0("loader", "ResourceDispatcher::OnSetDataBuffer");
 186   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 187   if (!request_info)
 188     return;
 189
 190   bool shm_valid = base::SharedMemory::IsHandleValid(shm_handle);
 191   CHECK((shm_valid && shm_size > 0) || (!shm_valid && !shm_size));
 192
 193   request_info->buffer.reset(
 194       new base::SharedMemory(shm_handle, true));  // read only
 195   request_info->received_data_factory =
 196       make_scoped_refptr(new SharedMemoryReceivedDataFactory(
 197           message_sender_, request_id, request_info->buffer));
 198
 199   bool ok = request_info->buffer->Map(shm_size);
 200   if (!ok) {
 201     // Added to help debug crbug/160401.
 202     base::ProcessId renderer_pid_copy = renderer_pid;
 203     base::debug::Alias(&renderer_pid_copy);
 204
 205     base::SharedMemoryHandle shm_handle_copy = shm_handle;
 206     base::debug::Alias(&shm_handle_copy);
 207
 208     CrashOnMapFailure();
 209     return;
 210   }
 211
 212   request_info->buffer_size = shm_size;
 213 }
 214
 215 void ResourceDispatcher::OnReceivedData(int request_id,
 216                                         int data_offset,
 217                                         int data_length,
 218                                         int encoded_data_length) {
 219   TRACE_EVENT0("loader", "ResourceDispatcher::OnReceivedData");
 220   DCHECK_GT(data_length, 0);
 221   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 222   bool send_ack = true;
 223   if (request_info && data_length > 0) {
 224     CHECK(base::SharedMemory::IsHandleValid(request_info->buffer->handle()));
 225     CHECK_GE(request_info->buffer_size, data_offset + data_length);
 226
 227     // Ensure that the SHM buffer remains valid for the duration of this scope.
 228     // It is possible for Cancel() to be called before we exit this scope.
 229     // SharedMemoryReceivedDataFactory stores the SHM buffer inside it.
 230     scoped_refptr<SharedMemoryReceivedDataFactory> factory(
 231         request_info->received_data_factory);
 232
 233     base::TimeTicks time_start = base::TimeTicks::Now();
 234
 235     const char* data_start = static_cast<char*>(request_info->buffer->memory());
 236     CHECK(data_start);
 237     CHECK(data_start + data_offset);
 238     const char* data_ptr = data_start + data_offset;
 239
 240     // Check whether this response data is compliant with our cross-site
 241     // document blocking policy. We only do this for the first chunk of data.
 242     if (request_info->site_isolation_metadata.get()) {
 243       SiteIsolationStatsGatherer::OnReceivedFirstChunk(
 244           request_info->site_isolation_metadata, data_ptr, data_length);
 245       request_info->site_isolation_metadata.reset();
 246     }
 247
 248     if (request_info->threaded_data_provider) {
 249       // A threaded data provider will take care of its own ACKing, as the data
 250       // may be processed later on another thread.
 251       send_ack = false;
 252       request_info->threaded_data_provider->OnReceivedDataOnForegroundThread(
 253           data_ptr, data_length, encoded_data_length);
 254     } else {
 255       scoped_ptr<RequestPeer::ReceivedData> data =
 256           factory->Create(data_offset, data_length, encoded_data_length);
 257       // |data| takes care of ACKing.
 258       send_ack = false;
 259       request_info->peer->OnReceivedData(data.Pass());
 260     }
 261
 262     UMA_HISTOGRAM_TIMES("ResourceDispatcher.OnReceivedDataTime",
 263                         base::TimeTicks::Now() - time_start);
 264   }
 265
 266   // Acknowledge the reception of this data.
 267   if (send_ack)
 268     message_sender_->Send(new ResourceHostMsg_DataReceived_ACK(request_id));
 269 }
 270
 271 void ResourceDispatcher::OnDownloadedData(int request_id,
 272                                           int data_len,
 273                                           int encoded_data_length) {
 274   // Acknowledge the reception of this message.
 275   message_sender_->Send(new ResourceHostMsg_DataDownloaded_ACK(request_id));
 276
 277   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 278   if (!request_info)
 279     return;
 280
 281   request_info->peer->OnDownloadedData(data_len, encoded_data_length);
 282 }
 283
 284 void ResourceDispatcher::OnReceivedRedirect(
 285     int request_id,
 286     const net::RedirectInfo& redirect_info,
 287     const ResourceResponseHead& response_head) {
 288   TRACE_EVENT0("loader", "ResourceDispatcher::OnReceivedRedirect");
 289   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 290   if (!request_info)
 291     return;
 292   request_info->response_start = ConsumeIOTimestamp();
 293
 294   ResourceResponseInfo renderer_response_info;
 295   ToResourceResponseInfo(*request_info, response_head, &renderer_response_info);
 296   if (request_info->peer->OnReceivedRedirect(redirect_info,
 297                                              renderer_response_info)) {
 298     // Double-check if the request is still around. The call above could
 299     // potentially remove it.
 300     request_info = GetPendingRequestInfo(request_id);
 301     if (!request_info)
 302       return;
 303     // We update the response_url here so that we can send it to
 304     // SiteIsolationStatsGatherer later when OnReceivedResponse is called.
 305     request_info->response_url = redirect_info.new_url;
 306     request_info->pending_redirect_message.reset(
 307         new ResourceHostMsg_FollowRedirect(request_id));
 308     if (!request_info->is_deferred) {
 309       FollowPendingRedirect(request_id, *request_info);
 310     }
 311   } else {
 312     Cancel(request_id);
 313   }
 314 }
 315
 316 void ResourceDispatcher::FollowPendingRedirect(
 317     int request_id,
 318     PendingRequestInfo& request_info) {
 319   IPC::Message* msg = request_info.pending_redirect_message.release();
 320   if (msg)
 321     message_sender_->Send(msg);
 322 }
 323
 324 void ResourceDispatcher::OnRequestComplete(
 325     int request_id,
 326     const ResourceMsg_RequestCompleteData& request_complete_data) {
 327   TRACE_EVENT0("loader", "ResourceDispatcher::OnRequestComplete");
 328
 329   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 330   if (!request_info)
 331     return;
 332   request_info->completion_time = ConsumeIOTimestamp();
 333   request_info->buffer.reset();
 334   if (request_info->received_data_factory)
 335     request_info->received_data_factory->Stop();
 336   request_info->received_data_factory = nullptr;
 337   request_info->buffer_size = 0;
 338
 339   RequestPeer* peer = request_info->peer;
 340
 341   if (delegate_) {
 342     RequestPeer* new_peer =
 343         delegate_->OnRequestComplete(
 344             request_info->peer, request_info->resource_type,
 345             request_complete_data.error_code);
 346     if (new_peer)
 347       request_info->peer = new_peer;
 348   }
 349
 350   base::TimeTicks renderer_completion_time = ToRendererCompletionTime(
 351       *request_info, request_complete_data.completion_time);
 352
 353   // If we have a threaded data provider, this message needs to bounce off the
 354   // background thread before it's returned to this thread and handled,
 355   // to make sure it's processed after all incoming data.
 356   if (request_info->threaded_data_provider) {
 357     request_info->threaded_data_provider->OnRequestCompleteForegroundThread(
 358         weak_factory_.GetWeakPtr(), request_complete_data,
 359         renderer_completion_time);
 360     return;
 361   }
 362
 363   // The request ID will be removed from our pending list in the destructor.
 364   // Normally, dispatching this message causes the reference-counted request to
 365   // die immediately.
 366   peer->OnCompletedRequest(request_complete_data.error_code,
 367                            request_complete_data.was_ignored_by_handler,
 368                            request_complete_data.exists_in_cache,
 369                            request_complete_data.security_info,
 370                            renderer_completion_time,
 371                            request_complete_data.encoded_data_length);
 372 }
 373
 374 void ResourceDispatcher::CompletedRequestAfterBackgroundThreadFlush(
 375     int request_id,
 376     const ResourceMsg_RequestCompleteData& request_complete_data,
 377     const base::TimeTicks& renderer_completion_time) {
 378   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 379   if (!request_info)
 380     return;
 381
 382   RequestPeer* peer = request_info->peer;
 383   peer->OnCompletedRequest(request_complete_data.error_code,
 384                            request_complete_data.was_ignored_by_handler,
 385                            request_complete_data.exists_in_cache,
 386                            request_complete_data.security_info,
 387                            renderer_completion_time,
 388                            request_complete_data.encoded_data_length);
 389 }
 390
 391 bool ResourceDispatcher::RemovePendingRequest(int request_id) {
 392   PendingRequestList::iterator it = pending_requests_.find(request_id);
 393   if (it == pending_requests_.end())
 394     return false;
 395
 396   PendingRequestInfo& request_info = it->second;
 397
 398   bool release_downloaded_file = request_info.download_to_file;
 399
 400   ReleaseResourcesInMessageQueue(&request_info.deferred_message_queue);
 401   pending_requests_.erase(it);
 402
 403   if (release_downloaded_file) {
 404     message_sender_->Send(
 405         new ResourceHostMsg_ReleaseDownloadedFile(request_id));
 406   }
 407
 408   return true;
 409 }
 410
 411 void ResourceDispatcher::Cancel(int request_id) {
 412   PendingRequestList::iterator it = pending_requests_.find(request_id);
 413   if (it == pending_requests_.end()) {
 414     DVLOG(1) << "unknown request";
 415     return;
 416   }
 417
 418   // Cancel the request, and clean it up so the bridge will receive no more
 419   // messages.
 420   message_sender_->Send(new ResourceHostMsg_CancelRequest(request_id));
 421   RemovePendingRequest(request_id);
 422 }
 423
 424 void ResourceDispatcher::SetDefersLoading(int request_id, bool value) {
 425   PendingRequestList::iterator it = pending_requests_.find(request_id);
 426   if (it == pending_requests_.end()) {
 427     DLOG(ERROR) << "unknown request";
 428     return;
 429   }
 430   PendingRequestInfo& request_info = it->second;
 431   if (value) {
 432     request_info.is_deferred = value;
 433   } else if (request_info.is_deferred) {
 434     request_info.is_deferred = false;
 435
 436     FollowPendingRedirect(request_id, request_info);
 437
 438     main_thread_task_runner_->PostTask(
 439         FROM_HERE, base::Bind(&ResourceDispatcher::FlushDeferredMessages,
 440                               weak_factory_.GetWeakPtr(), request_id));
 441   }
 442 }
 443
 444 void ResourceDispatcher::DidChangePriority(int request_id,
 445                                            net::RequestPriority new_priority,
 446                                            int intra_priority_value) {
 447   DCHECK(ContainsKey(pending_requests_, request_id));
 448   message_sender_->Send(new ResourceHostMsg_DidChangePriority(
 449       request_id, new_priority, intra_priority_value));
 450 }
 451
 452 bool ResourceDispatcher::AttachThreadedDataReceiver(
 453     int request_id, blink::WebThreadedDataReceiver* threaded_data_receiver) {
 454   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
 455   DCHECK(request_info);
 456
 457   if (request_info->buffer != NULL) {
 458     DCHECK(!request_info->threaded_data_provider);
 459     request_info->threaded_data_provider = new ThreadedDataProvider(
 460         request_id, threaded_data_receiver, request_info->buffer,
 461         request_info->buffer_size, main_thread_task_runner_);
 462     return true;
 463   }
 464
 465   return false;
 466 }
 467
 468 ResourceDispatcher::PendingRequestInfo::PendingRequestInfo()
 469     : peer(NULL),
 470       threaded_data_provider(NULL),
 471       resource_type(RESOURCE_TYPE_SUB_RESOURCE),
 472       is_deferred(false),
 473       download_to_file(false),
 474       buffer_size(0) {
 475 }
 476
 477 ResourceDispatcher::PendingRequestInfo::PendingRequestInfo(
 478     RequestPeer* peer,
 479     ResourceType resource_type,
 480     int origin_pid,
 481     const GURL& frame_origin,
 482     const GURL& request_url,
 483     bool download_to_file)
 484     : peer(peer),
 485       threaded_data_provider(NULL),
 486       resource_type(resource_type),
 487       origin_pid(origin_pid),
 488       is_deferred(false),
 489       url(request_url),
 490       frame_origin(frame_origin),
 491       response_url(request_url),
 492       download_to_file(download_to_file),
 493       request_start(base::TimeTicks::Now()) {
 494 }
 495
 496 ResourceDispatcher::PendingRequestInfo::~PendingRequestInfo() {
 497   if (threaded_data_provider)
 498     threaded_data_provider->Stop();
 499 }
 500
 501 void ResourceDispatcher::DispatchMessage(const IPC::Message& message) {
 502   IPC_BEGIN_MESSAGE_MAP(ResourceDispatcher, message)
 503     IPC_MESSAGE_HANDLER(ResourceMsg_UploadProgress, OnUploadProgress)
 504     IPC_MESSAGE_HANDLER(ResourceMsg_ReceivedResponse, OnReceivedResponse)
 505     IPC_MESSAGE_HANDLER(ResourceMsg_ReceivedCachedMetadata,
 506                         OnReceivedCachedMetadata)
 507     IPC_MESSAGE_HANDLER(ResourceMsg_ReceivedRedirect, OnReceivedRedirect)
 508     IPC_MESSAGE_HANDLER(ResourceMsg_SetDataBuffer, OnSetDataBuffer)
 509     IPC_MESSAGE_HANDLER(ResourceMsg_DataReceived, OnReceivedData)
 510     IPC_MESSAGE_HANDLER(ResourceMsg_DataDownloaded, OnDownloadedData)
 511     IPC_MESSAGE_HANDLER(ResourceMsg_RequestComplete, OnRequestComplete)
 512   IPC_END_MESSAGE_MAP()
 513 }
 514
 515 void ResourceDispatcher::FlushDeferredMessages(int request_id) {
 516   PendingRequestList::iterator it = pending_requests_.find(request_id);
 517   if (it == pending_requests_.end())  // The request could have become invalid.
 518     return;
 519   PendingRequestInfo& request_info = it->second;
 520   if (request_info.is_deferred)
 521     return;
 522   // Because message handlers could result in request_info being destroyed,
 523   // we need to work with a stack reference to the deferred queue.
 524   MessageQueue q;
 525   q.swap(request_info.deferred_message_queue);
 526   while (!q.empty()) {
 527     IPC::Message* m = q.front();
 528     q.pop_front();
 529     DispatchMessage(*m);
 530     delete m;
 531     // If this request is deferred in the context of the above message, then
 532     // we should honor the same and stop dispatching further messages.
 533     // We need to find the request again in the list as it may have completed
 534     // by now and the request_info instance above may be invalid.
 535     PendingRequestList::iterator index = pending_requests_.find(request_id);
 536     if (index != pending_requests_.end()) {
 537       PendingRequestInfo& pending_request = index->second;
 538       if (pending_request.is_deferred) {
 539         pending_request.deferred_message_queue.swap(q);
 540         return;
 541       }
 542     }
 543   }
 544 }
 545
 546 void ResourceDispatcher::StartSync(const RequestInfo& request_info,
 547                                    ResourceRequestBody* request_body,
 548                                    SyncLoadResponse* response) {
 549   scoped_ptr<ResourceHostMsg_Request> request =
 550       CreateRequest(request_info, request_body, NULL);
 551
 552   SyncLoadResult result;
 553   IPC::SyncMessage* msg = new ResourceHostMsg_SyncLoad(
 554       request_info.routing_id, MakeRequestID(), *request, &result);
 555
 556   // NOTE: This may pump events (see RenderThread::Send).
 557   if (!message_sender_->Send(msg)) {
 558     response->error_code = net::ERR_FAILED;
 559     return;
 560   }
 561
 562   response->error_code = result.error_code;
 563   response->url = result.final_url;
 564   response->headers = result.headers;
 565   response->mime_type = result.mime_type;
 566   response->charset = result.charset;
 567   response->request_time = result.request_time;
 568   response->response_time = result.response_time;
 569   response->encoded_data_length = result.encoded_data_length;
 570   response->load_timing = result.load_timing;
 571   response->devtools_info = result.devtools_info;
 572   response->data.swap(result.data);
 573   response->download_file_path = result.download_file_path;
 574 }
 575
 576 int ResourceDispatcher::StartAsync(const RequestInfo& request_info,
 577                                    ResourceRequestBody* request_body,
 578                                    RequestPeer* peer) {
 579   GURL frame_origin;
 580   scoped_ptr<ResourceHostMsg_Request> request =
 581       CreateRequest(request_info, request_body, &frame_origin);
 582
 583   // Compute a unique request_id for this renderer process.
 584   int request_id = MakeRequestID();
 585   pending_requests_[request_id] =
 586       PendingRequestInfo(peer,
 587                          request->resource_type,
 588                          request->origin_pid,
 589                          frame_origin,
 590                          request->url,
 591                          request_info.download_to_file);
 592
 593   message_sender_->Send(new ResourceHostMsg_RequestResource(
 594       request_info.routing_id, request_id, *request));
 595
 596   return request_id;
 597 }
 598
 599 void ResourceDispatcher::ToResourceResponseInfo(
 600     const PendingRequestInfo& request_info,
 601     const ResourceResponseHead& browser_info,
 602     ResourceResponseInfo* renderer_info) const {
 603   *renderer_info = browser_info;
 604   if (request_info.request_start.is_null() ||
 605       request_info.response_start.is_null() ||
 606       browser_info.request_start.is_null() ||
 607       browser_info.response_start.is_null() ||
 608       browser_info.load_timing.request_start.is_null()) {
 609     return;
 610   }
 611   InterProcessTimeTicksConverter converter(
 612       LocalTimeTicks::FromTimeTicks(request_info.request_start),
 613       LocalTimeTicks::FromTimeTicks(request_info.response_start),
 614       RemoteTimeTicks::FromTimeTicks(browser_info.request_start),
 615       RemoteTimeTicks::FromTimeTicks(browser_info.response_start));
 616
 617   net::LoadTimingInfo* load_timing = &renderer_info->load_timing;
 618   RemoteToLocalTimeTicks(converter, &load_timing->request_start);
 619   RemoteToLocalTimeTicks(converter, &load_timing->proxy_resolve_start);
 620   RemoteToLocalTimeTicks(converter, &load_timing->proxy_resolve_end);
 621   RemoteToLocalTimeTicks(converter, &load_timing->connect_timing.dns_start);
 622   RemoteToLocalTimeTicks(converter, &load_timing->connect_timing.dns_end);
 623   RemoteToLocalTimeTicks(converter, &load_timing->connect_timing.connect_start);
 624   RemoteToLocalTimeTicks(converter, &load_timing->connect_timing.connect_end);
 625   RemoteToLocalTimeTicks(converter, &load_timing->connect_timing.ssl_start);
 626   RemoteToLocalTimeTicks(converter, &load_timing->connect_timing.ssl_end);
 627   RemoteToLocalTimeTicks(converter, &load_timing->send_start);
 628   RemoteToLocalTimeTicks(converter, &load_timing->send_end);
 629   RemoteToLocalTimeTicks(converter, &load_timing->receive_headers_end);
 630   RemoteToLocalTimeTicks(converter, &renderer_info->service_worker_start_time);
 631   RemoteToLocalTimeTicks(converter, &renderer_info->service_worker_ready_time);
 632
 633   // Collect UMA on the inter-process skew.
 634   bool is_skew_additive = false;
 635   if (converter.IsSkewAdditiveForMetrics()) {
 636     is_skew_additive = true;
 637     base::TimeDelta skew = converter.GetSkewForMetrics();
 638     if (skew >= base::TimeDelta()) {
 639       UMA_HISTOGRAM_TIMES(
 640           "InterProcessTimeTicks.BrowserAhead_BrowserToRenderer", skew);
 641     } else {
 642       UMA_HISTOGRAM_TIMES(
 643           "InterProcessTimeTicks.BrowserBehind_BrowserToRenderer", -skew);
 644     }
 645   }
 646   UMA_HISTOGRAM_BOOLEAN(
 647       "InterProcessTimeTicks.IsSkewAdditive_BrowserToRenderer",
 648       is_skew_additive);
 649 }
 650
 651 base::TimeTicks ResourceDispatcher::ToRendererCompletionTime(
 652     const PendingRequestInfo& request_info,
 653     const base::TimeTicks& browser_completion_time) const {
 654   if (request_info.completion_time.is_null()) {
 655     return browser_completion_time;
 656   }
 657
 658   // TODO(simonjam): The optimal lower bound should be the most recent value of
 659   // TimeTicks::Now() returned to WebKit. Is it worth trying to cache that?
 660   // Until then, |response_start| is used as it is the most recent value
 661   // returned for this request.
 662   int64 result = std::max(browser_completion_time.ToInternalValue(),
 663                           request_info.response_start.ToInternalValue());
 664   result = std::min(result, request_info.completion_time.ToInternalValue());
 665   return base::TimeTicks::FromInternalValue(result);
 666 }
 667
 668 base::TimeTicks ResourceDispatcher::ConsumeIOTimestamp() {
 669   if (io_timestamp_ == base::TimeTicks())
 670     return base::TimeTicks::Now();
 671   base::TimeTicks result = io_timestamp_;
 672   io_timestamp_ = base::TimeTicks();
 673   return result;
 674 }
 675
 676 // static
 677 bool ResourceDispatcher::IsResourceDispatcherMessage(
 678     const IPC::Message& message) {
 679   switch (message.type()) {
 680     case ResourceMsg_UploadProgress::ID:
 681     case ResourceMsg_ReceivedResponse::ID:
 682     case ResourceMsg_ReceivedCachedMetadata::ID:
 683     case ResourceMsg_ReceivedRedirect::ID:
 684     case ResourceMsg_SetDataBuffer::ID:
 685     case ResourceMsg_DataReceived::ID:
 686     case ResourceMsg_DataDownloaded::ID:
 687     case ResourceMsg_RequestComplete::ID:
 688       return true;
 689
 690     default:
 691       break;
 692   }
 693
 694   return false;
 695 }
 696
 697 // static
 698 void ResourceDispatcher::ReleaseResourcesInDataMessage(
 699     const IPC::Message& message) {
 700   base::PickleIterator iter(message);
 701   int request_id;
 702   if (!iter.ReadInt(&request_id)) {
 703     NOTREACHED() << "malformed resource message";
 704     return;
 705   }
 706
 707   // If the message contains a shared memory handle, we should close the handle
 708   // or there will be a memory leak.
 709   if (message.type() == ResourceMsg_SetDataBuffer::ID) {
 710     base::SharedMemoryHandle shm_handle;
 711     if (IPC::ParamTraits<base::SharedMemoryHandle>::Read(&message,
 712                                                          &iter,
 713                                                          &shm_handle)) {
 714       if (base::SharedMemory::IsHandleValid(shm_handle))
 715         base::SharedMemory::CloseHandle(shm_handle);
 716     }
 717   }
 718 }
 719
 720 // static
 721 void ResourceDispatcher::ReleaseResourcesInMessageQueue(MessageQueue* queue) {
 722   while (!queue->empty()) {
 723     IPC::Message* message = queue->front();
 724     ReleaseResourcesInDataMessage(*message);
 725     queue->pop_front();
 726     delete message;
 727   }
 728 }
 729
 730 scoped_ptr<ResourceHostMsg_Request> ResourceDispatcher::CreateRequest(
 731     const RequestInfo& request_info,
 732     ResourceRequestBody* request_body,
 733     GURL* frame_origin) {
 734   scoped_ptr<ResourceHostMsg_Request> request(new ResourceHostMsg_Request);
 735   request->method = request_info.method;
 736   request->url = request_info.url;
 737   request->first_party_for_cookies = request_info.first_party_for_cookies;
 738   request->referrer = request_info.referrer.url;
 739   request->referrer_policy = request_info.referrer.policy;
 740   request->headers = request_info.headers;
 741   request->load_flags = request_info.load_flags;
 742   request->origin_pid = request_info.requestor_pid;
 743   request->resource_type = request_info.request_type;
 744   request->priority = request_info.priority;
 745   request->request_context = request_info.request_context;
 746   request->appcache_host_id = request_info.appcache_host_id;
 747   request->download_to_file = request_info.download_to_file;
 748   request->has_user_gesture = request_info.has_user_gesture;
 749   request->skip_service_worker = request_info.skip_service_worker;
 750   request->should_reset_appcache = request_info.should_reset_appcache;
 751   request->fetch_request_mode = request_info.fetch_request_mode;
 752   request->fetch_credentials_mode = request_info.fetch_credentials_mode;
 753   request->fetch_redirect_mode = request_info.fetch_redirect_mode;
 754   request->fetch_request_context_type = request_info.fetch_request_context_type;
 755   request->fetch_frame_type = request_info.fetch_frame_type;
 756   request->enable_load_timing = request_info.enable_load_timing;
 757   request->enable_upload_progress = request_info.enable_upload_progress;
 758   request->do_not_prompt_for_login = request_info.do_not_prompt_for_login;
 759   request->report_raw_headers = request_info.report_raw_headers;
 760
 761   if ((request_info.referrer.policy == blink::WebReferrerPolicyDefault ||
 762        request_info.referrer.policy ==
 763            blink::WebReferrerPolicyNoReferrerWhenDowngrade) &&
 764       request_info.referrer.url.SchemeIsCryptographic() &&
 765       !request_info.url.SchemeIsCryptographic()) {
 766     LOG(FATAL) << "Trying to send secure referrer for insecure request "
 767                << "without an appropriate referrer policy.\n"
 768                << "URL = " << request_info.url << "\n"
 769                << "Referrer = " << request_info.referrer.url;
 770   }
 771
 772   const RequestExtraData kEmptyData;
 773   const RequestExtraData* extra_data;
 774   if (request_info.extra_data)
 775     extra_data = static_cast<RequestExtraData*>(request_info.extra_data);
 776   else
 777     extra_data = &kEmptyData;
 778   request->visiblity_state = extra_data->visibility_state();
 779   request->render_frame_id = extra_data->render_frame_id();
 780   request->is_main_frame = extra_data->is_main_frame();
 781   request->parent_is_main_frame = extra_data->parent_is_main_frame();
 782   request->parent_render_frame_id = extra_data->parent_render_frame_id();
 783   request->allow_download = extra_data->allow_download();
 784   request->transition_type = extra_data->transition_type();
 785   request->should_replace_current_entry =
 786       extra_data->should_replace_current_entry();
 787   request->transferred_request_child_id =
 788       extra_data->transferred_request_child_id();
 789   request->transferred_request_request_id =
 790       extra_data->transferred_request_request_id();
 791   request->service_worker_provider_id =
 792       extra_data->service_worker_provider_id();
 793   request->request_body = request_body;
 794   if (frame_origin)
 795     *frame_origin = extra_data->frame_origin();
 796   return request.Pass();
 797 }
 798
 799 }  // namespace content