content/browser/frame_host/navigator_impl.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/frame_host/navigator_impl.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/time/time.h"
  10 #include "content/browser/frame_host/frame_tree.h"
  11 #include "content/browser/frame_host/frame_tree_node.h"
  12 #include "content/browser/frame_host/navigation_controller_impl.h"
  13 #include "content/browser/frame_host/navigation_entry_impl.h"
  14 #include "content/browser/frame_host/navigation_request.h"
  15 #include "content/browser/frame_host/navigation_request_info.h"
  16 #include "content/browser/frame_host/navigator_delegate.h"
  17 #include "content/browser/frame_host/render_frame_host_impl.h"
  18 #include "content/browser/renderer_host/render_view_host_impl.h"
  19 #include "content/browser/site_instance_impl.h"
  20 #include "content/browser/webui/web_ui_controller_factory_registry.h"
  21 #include "content/browser/webui/web_ui_impl.h"
  22 #include "content/common/frame_messages.h"
  23 #include "content/common/navigation_params.h"
  24 #include "content/common/view_messages.h"
  25 #include "content/public/browser/browser_context.h"
  26 #include "content/public/browser/content_browser_client.h"
  27 #include "content/public/browser/global_request_id.h"
  28 #include "content/public/browser/invalidate_type.h"
  29 #include "content/public/browser/navigation_controller.h"
  30 #include "content/public/browser/navigation_details.h"
  31 #include "content/public/browser/page_navigator.h"
  32 #include "content/public/browser/render_view_host.h"
  33 #include "content/public/browser/stream_handle.h"
  34 #include "content/public/browser/user_metrics.h"
  35 #include "content/public/common/bindings_policy.h"
  36 #include "content/public/common/content_client.h"
  37 #include "content/public/common/content_switches.h"
  38 #include "content/public/common/resource_response.h"
  39 #include "content/public/common/url_constants.h"
  40 #include "content/public/common/url_utils.h"
  41
  42 namespace content {
  43
  44 namespace {
  45
  46 FrameMsg_Navigate_Type::Value GetNavigationType(
  47     BrowserContext* browser_context, const NavigationEntryImpl& entry,
  48     NavigationController::ReloadType reload_type) {
  49   switch (reload_type) {
  50     case NavigationControllerImpl::RELOAD:
  51       return FrameMsg_Navigate_Type::RELOAD;
  52     case NavigationControllerImpl::RELOAD_IGNORING_CACHE:
  53       return FrameMsg_Navigate_Type::RELOAD_IGNORING_CACHE;
  54     case NavigationControllerImpl::RELOAD_ORIGINAL_REQUEST_URL:
  55       return FrameMsg_Navigate_Type::RELOAD_ORIGINAL_REQUEST_URL;
  56     case NavigationControllerImpl::NO_RELOAD:
  57       break;  // Fall through to rest of function.
  58   }
  59
  60   // |RenderViewImpl::PopulateStateFromPendingNavigationParams| differentiates
  61   // between |RESTORE_WITH_POST| and |RESTORE|.
  62   if (entry.restore_type() ==
  63       NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY) {
  64     if (entry.GetHasPostData())
  65       return FrameMsg_Navigate_Type::RESTORE_WITH_POST;
  66     return FrameMsg_Navigate_Type::RESTORE;
  67   }
  68
  69   return FrameMsg_Navigate_Type::NORMAL;
  70 }
  71
  72 RenderFrameHostManager* GetRenderManager(RenderFrameHostImpl* rfh) {
  73   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
  74           switches::kSitePerProcess))
  75     return rfh->frame_tree_node()->render_manager();
  76
  77   return rfh->frame_tree_node()->frame_tree()->root()->render_manager();
  78 }
  79
  80 void MakeNavigateParams(const NavigationEntryImpl& entry,
  81                         NavigationControllerImpl* controller,
  82                         NavigationController::ReloadType reload_type,
  83                         base::TimeTicks navigation_start,
  84                         FrameMsg_Navigate_Params* params) {
  85   FrameMsg_UILoadMetricsReportType::Value report_type =
  86       FrameMsg_UILoadMetricsReportType::NO_REPORT;
  87   base::TimeTicks ui_timestamp = base::TimeTicks();
  88 #if defined(OS_ANDROID)
  89   if (!entry.intent_received_timestamp().is_null())
  90     report_type = FrameMsg_UILoadMetricsReportType::REPORT_INTENT;
  91   ui_timestamp = entry.intent_received_timestamp();
  92 #endif
  93
  94   params->common_params = CommonNavigationParams(
  95       entry.GetURL(), entry.GetReferrer(), entry.GetTransitionType(),
  96       GetNavigationType(controller->GetBrowserContext(), entry, reload_type),
  97       !entry.IsViewSourceMode(), ui_timestamp, report_type,
  98       entry.GetBaseURLForDataURL(), entry.GetHistoryURLForDataURL());
  99   params->commit_params = CommitNavigationParams(
 100       entry.GetPageState(), entry.GetIsOverridingUserAgent(), navigation_start);
 101   params->is_post = entry.GetHasPostData();
 102   params->extra_headers = entry.extra_headers();
 103   if (entry.GetBrowserInitiatedPostData()) {
 104     params->browser_initiated_post_data.assign(
 105         entry.GetBrowserInitiatedPostData()->front(),
 106         entry.GetBrowserInitiatedPostData()->front() +
 107             entry.GetBrowserInitiatedPostData()->size());
 108   }
 109
 110   params->should_replace_current_entry = entry.should_replace_entry();
 111   // This is used by the old performance infrastructure to set up DocumentState
 112   // associated with the RenderView.
 113   // TODO(ppi): make it go away.
 114   params->request_time = base::Time::Now();
 115   params->transferred_request_child_id =
 116       entry.transferred_global_request_id().child_id;
 117   params->transferred_request_request_id =
 118       entry.transferred_global_request_id().request_id;
 119
 120   params->page_id = entry.GetPageID();
 121   params->should_clear_history_list = entry.should_clear_history_list();
 122   if (entry.should_clear_history_list()) {
 123     // Set the history list related parameters to the same values a
 124     // NavigationController would return before its first navigation. This will
 125     // fully clear the RenderView's view of the session history.
 126     params->pending_history_list_offset = -1;
 127     params->current_history_list_offset = -1;
 128     params->current_history_list_length = 0;
 129   } else {
 130     params->pending_history_list_offset = controller->GetIndexOfEntry(&entry);
 131     params->current_history_list_offset =
 132         controller->GetLastCommittedEntryIndex();
 133     params->current_history_list_length = controller->GetEntryCount();
 134   }
 135   // Set the redirect chain to the navigation's redirects, unless we are
 136   // returning to a completed navigation (whose previous redirects don't apply).
 137   if (ui::PageTransitionIsNewNavigation(params->common_params.transition)) {
 138     params->redirects = entry.GetRedirectChain();
 139   } else {
 140     params->redirects.clear();
 141   }
 142
 143   params->can_load_local_resources = entry.GetCanLoadLocalResources();
 144   params->frame_to_navigate = entry.GetFrameToNavigate();
 145 }
 146
 147 }  // namespace
 148
 149 struct NavigatorImpl::NavigationMetricsData {
 150   NavigationMetricsData(base::TimeTicks start_time,
 151                         GURL url,
 152                         NavigationEntryImpl::RestoreType restore_type)
 153       : start_time_(start_time), url_(url) {
 154     is_restoring_from_last_session_ =
 155         (restore_type ==
 156              NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY ||
 157          restore_type == NavigationEntryImpl::RESTORE_LAST_SESSION_CRASHED);
 158   }
 159
 160   base::TimeTicks start_time_;
 161   GURL url_;
 162   bool is_restoring_from_last_session_;
 163   base::TimeTicks url_job_start_time_;
 164   base::TimeDelta before_unload_delay_;
 165 };
 166
 167 NavigatorImpl::NavigatorImpl(
 168     NavigationControllerImpl* navigation_controller,
 169     NavigatorDelegate* delegate)
 170     : controller_(navigation_controller),
 171       delegate_(delegate) {
 172 }
 173
 174 NavigatorImpl::~NavigatorImpl() {}
 175
 176 NavigationController* NavigatorImpl::GetController() {
 177   return controller_;
 178 }
 179
 180 void NavigatorImpl::DidStartProvisionalLoad(
 181     RenderFrameHostImpl* render_frame_host,
 182     const GURL& url,
 183     bool is_transition_navigation) {
 184   bool is_error_page = (url.spec() == kUnreachableWebDataURL);
 185   bool is_iframe_srcdoc = (url.spec() == kAboutSrcDocURL);
 186   GURL validated_url(url);
 187   RenderProcessHost* render_process_host = render_frame_host->GetProcess();
 188   render_process_host->FilterURL(false, &validated_url);
 189
 190   bool is_main_frame = render_frame_host->frame_tree_node()->IsMainFrame();
 191   NavigationEntryImpl* pending_entry = controller_->GetPendingEntry();
 192   if (is_main_frame) {
 193     // If there is no browser-initiated pending entry for this navigation and it
 194     // is not for the error URL, create a pending entry using the current
 195     // SiteInstance, and ensure the address bar updates accordingly.  We don't
 196     // know the referrer or extra headers at this point, but the referrer will
 197     // be set properly upon commit.
 198     bool has_browser_initiated_pending_entry = pending_entry &&
 199         !pending_entry->is_renderer_initiated();
 200     if (!has_browser_initiated_pending_entry && !is_error_page) {
 201       NavigationEntryImpl* entry = NavigationEntryImpl::FromNavigationEntry(
 202           controller_->CreateNavigationEntry(validated_url,
 203                                              content::Referrer(),
 204                                              ui::PAGE_TRANSITION_LINK,
 205                                              true /* is_renderer_initiated */,
 206                                              std::string(),
 207                                              controller_->GetBrowserContext()));
 208       entry->set_site_instance(render_frame_host->GetSiteInstance());
 209       // TODO(creis): If there's a pending entry already, find a safe way to
 210       // update it instead of replacing it and copying over things like this.
 211       if (pending_entry) {
 212         entry->set_transferred_global_request_id(
 213             pending_entry->transferred_global_request_id());
 214         entry->set_should_replace_entry(pending_entry->should_replace_entry());
 215         entry->SetRedirectChain(pending_entry->GetRedirectChain());
 216       }
 217       controller_->SetPendingEntry(entry);
 218       if (delegate_)
 219         delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
 220     }
 221
 222     if (delegate_ && is_transition_navigation)
 223       delegate_->DidStartNavigationTransition(render_frame_host);
 224   }
 225
 226   if (delegate_) {
 227     // Notify the observer about the start of the provisional load.
 228     delegate_->DidStartProvisionalLoad(
 229         render_frame_host, validated_url, is_error_page, is_iframe_srcdoc);
 230   }
 231 }
 232
 233
 234 void NavigatorImpl::DidFailProvisionalLoadWithError(
 235     RenderFrameHostImpl* render_frame_host,
 236     const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {
 237   VLOG(1) << "Failed Provisional Load: " << params.url.possibly_invalid_spec()
 238           << ", error_code: " << params.error_code
 239           << ", error_description: " << params.error_description
 240           << ", showing_repost_interstitial: " <<
 241             params.showing_repost_interstitial
 242           << ", frame_id: " << render_frame_host->GetRoutingID();
 243   GURL validated_url(params.url);
 244   RenderProcessHost* render_process_host = render_frame_host->GetProcess();
 245   render_process_host->FilterURL(false, &validated_url);
 246
 247   if (net::ERR_ABORTED == params.error_code) {
 248     // EVIL HACK ALERT! Ignore failed loads when we're showing interstitials.
 249     // This means that the interstitial won't be torn down properly, which is
 250     // bad. But if we have an interstitial, go back to another tab type, and
 251     // then load the same interstitial again, we could end up getting the first
 252     // interstitial's "failed" message (as a result of the cancel) when we're on
 253     // the second one. We can't tell this apart, so we think we're tearing down
 254     // the current page which will cause a crash later on.
 255     //
 256     // http://code.google.com/p/chromium/issues/detail?id=2855
 257     // Because this will not tear down the interstitial properly, if "back" is
 258     // back to another tab type, the interstitial will still be somewhat alive
 259     // in the previous tab type. If you navigate somewhere that activates the
 260     // tab with the interstitial again, you'll see a flash before the new load
 261     // commits of the interstitial page.
 262     FrameTreeNode* root =
 263         render_frame_host->frame_tree_node()->frame_tree()->root();
 264     if (root->render_manager()->interstitial_page() != NULL) {
 265       LOG(WARNING) << "Discarding message during interstitial.";
 266       return;
 267     }
 268
 269     // We used to cancel the pending renderer here for cross-site downloads.
 270     // However, it's not safe to do that because the download logic repeatedly
 271     // looks for this WebContents based on a render ID.  Instead, we just
 272     // leave the pending renderer around until the next navigation event
 273     // (Navigate, DidNavigate, etc), which will clean it up properly.
 274     //
 275     // TODO(creis): Find a way to cancel any pending RFH here.
 276   }
 277
 278   // We usually clear the pending entry when it fails, so that an arbitrary URL
 279   // isn't left visible above a committed page.  This must be enforced when
 280   // the pending entry isn't visible (e.g., renderer-initiated navigations) to
 281   // prevent URL spoofs for in-page navigations that don't go through
 282   // DidStartProvisionalLoadForFrame.
 283   //
 284   // However, we do preserve the pending entry in some cases, such as on the
 285   // initial navigation of an unmodified blank tab.  We also allow the delegate
 286   // to say when it's safe to leave aborted URLs in the omnibox, to let the user
 287   // edit the URL and try again.  This may be useful in cases that the committed
 288   // page cannot be attacker-controlled.  In these cases, we still allow the
 289   // view to clear the pending entry and typed URL if the user requests
 290   // (e.g., hitting Escape with focus in the address bar).
 291   //
 292   // Note: don't touch the transient entry, since an interstitial may exist.
 293   bool should_preserve_entry = controller_->IsUnmodifiedBlankTab() ||
 294       delegate_->ShouldPreserveAbortedURLs();
 295   if (controller_->GetPendingEntry() != controller_->GetVisibleEntry() ||
 296       !should_preserve_entry) {
 297     controller_->DiscardPendingEntry();
 298
 299     // Also force the UI to refresh.
 300     controller_->delegate()->NotifyNavigationStateChanged(INVALIDATE_TYPE_URL);
 301   }
 302
 303   if (delegate_)
 304     delegate_->DidFailProvisionalLoadWithError(render_frame_host, params);
 305 }
 306
 307 void NavigatorImpl::DidFailLoadWithError(
 308     RenderFrameHostImpl* render_frame_host,
 309     const GURL& url,
 310     int error_code,
 311     const base::string16& error_description) {
 312   if (delegate_) {
 313     delegate_->DidFailLoadWithError(
 314         render_frame_host, url, error_code,
 315         error_description);
 316   }
 317 }
 318
 319 bool NavigatorImpl::NavigateToEntry(
 320     FrameTreeNode* frame_tree_node,
 321     const NavigationEntryImpl& entry,
 322     NavigationController::ReloadType reload_type) {
 323   TRACE_EVENT0("browser,navigation", "NavigatorImpl::NavigateToEntry");
 324
 325   // The renderer will reject IPC messages with URLs longer than
 326   // this limit, so don't attempt to navigate with a longer URL.
 327   if (entry.GetURL().spec().size() > GetMaxURLChars()) {
 328     LOG(WARNING) << "Refusing to load URL as it exceeds " << GetMaxURLChars()
 329                  << " characters.";
 330     return false;
 331   }
 332
 333   // This will be used to set the Navigation Timing API navigationStart
 334   // parameter for browser navigations in new tabs (intents, tabs opened through
 335   // "Open link in new tab"). We need to keep it above RFHM::Navigate() call to
 336   // capture the time needed for the RenderFrameHost initialization.
 337   base::TimeTicks navigation_start = base::TimeTicks::Now();
 338
 339   RenderFrameHostManager* manager = frame_tree_node->render_manager();
 340
 341   // PlzNavigate: the RenderFrameHosts are no longer asked to navigate.
 342   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 343           switches::kEnableBrowserSideNavigation)) {
 344     navigation_data_.reset(new NavigationMetricsData(
 345         navigation_start, entry.GetURL(), entry.restore_type()));
 346     RequestNavigation(frame_tree_node, entry, reload_type, navigation_start);
 347     return true;
 348   }
 349
 350   RenderFrameHostImpl* dest_render_frame_host = manager->Navigate(entry);
 351   if (!dest_render_frame_host)
 352     return false;  // Unable to create the desired RenderFrameHost.
 353
 354   // Make sure no code called via RFHM::Navigate clears the pending entry.
 355   CHECK_EQ(controller_->GetPendingEntry(), &entry);
 356
 357   // For security, we should never send non-Web-UI URLs to a Web UI renderer.
 358   // Double check that here.
 359   CheckWebUIRendererDoesNotDisplayNormalURL(
 360       dest_render_frame_host, entry.GetURL());
 361
 362   // Notify observers that we will navigate in this RenderFrame.
 363   if (delegate_) {
 364     delegate_->AboutToNavigateRenderFrame(frame_tree_node->current_frame_host(),
 365                                           dest_render_frame_host);
 366   }
 367
 368   // Create the navigation parameters.
 369   // TODO(vitalybuka): Move this before AboutToNavigateRenderFrame once
 370   // http://crbug.com/408684 is fixed.
 371   FrameMsg_Navigate_Params navigate_params;
 372   MakeNavigateParams(
 373       entry, controller_, reload_type, navigation_start, &navigate_params);
 374
 375   // Navigate in the desired RenderFrameHost.
 376   // We can skip this step in the rare case that this is a transfer navigation
 377   // which began in the chosen RenderFrameHost, since the request has already
 378   // been issued.  In that case, simply resume the response.
 379   bool is_transfer_to_same =
 380       navigate_params.transferred_request_child_id != -1 &&
 381       navigate_params.transferred_request_child_id ==
 382           dest_render_frame_host->GetProcess()->GetID();
 383   if (!is_transfer_to_same) {
 384     navigation_data_.reset(new NavigationMetricsData(
 385         navigation_start, entry.GetURL(), entry.restore_type()));
 386     dest_render_frame_host->Navigate(navigate_params);
 387   } else {
 388     // No need to navigate again.  Just resume the deferred request.
 389     dest_render_frame_host->GetProcess()->ResumeDeferredNavigation(
 390         GlobalRequestID(navigate_params.transferred_request_child_id,
 391                         navigate_params.transferred_request_request_id));
 392   }
 393
 394   // Make sure no code called via RFH::Navigate clears the pending entry.
 395   CHECK_EQ(controller_->GetPendingEntry(), &entry);
 396
 397   if (entry.GetPageID() == -1) {
 398     // HACK!!  This code suppresses javascript: URLs from being added to
 399     // session history, which is what we want to do for javascript: URLs that
 400     // do not generate content.  What we really need is a message from the
 401     // renderer telling us that a new page was not created.  The same message
 402     // could be used for mailto: URLs and the like.
 403     if (entry.GetURL().SchemeIs(url::kJavaScriptScheme))
 404       return false;
 405   }
 406
 407   // Notify observers about navigation.
 408   if (delegate_)
 409     delegate_->DidStartNavigationToPendingEntry(entry.GetURL(), reload_type);
 410
 411   return true;
 412 }
 413
 414 bool NavigatorImpl::NavigateToPendingEntry(
 415     FrameTreeNode* frame_tree_node,
 416     NavigationController::ReloadType reload_type) {
 417   return NavigateToEntry(frame_tree_node, *controller_->GetPendingEntry(),
 418                          reload_type);
 419 }
 420
 421 void NavigatorImpl::DidNavigate(
 422     RenderFrameHostImpl* render_frame_host,
 423     const FrameHostMsg_DidCommitProvisionalLoad_Params& input_params) {
 424   // PlzNavigate
 425   // The navigation request has been committed so the browser process doesn't
 426   // need to care about it anymore.
 427   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 428           switches::kEnableBrowserSideNavigation)) {
 429     navigation_request_map_.erase(
 430         render_frame_host->frame_tree_node()->frame_tree_node_id());
 431   }
 432
 433   FrameHostMsg_DidCommitProvisionalLoad_Params params(input_params);
 434   FrameTree* frame_tree = render_frame_host->frame_tree_node()->frame_tree();
 435   bool use_site_per_process = base::CommandLine::ForCurrentProcess()->HasSwitch(
 436       switches::kSitePerProcess);
 437
 438   if (ui::PageTransitionIsMainFrame(params.transition)) {
 439     if (delegate_) {
 440       // When overscroll navigation gesture is enabled, a screenshot of the page
 441       // in its current state is taken so that it can be used during the
 442       // nav-gesture. It is necessary to take the screenshot here, before
 443       // calling RenderFrameHostManager::DidNavigateMainFrame, because that can
 444       // change WebContents::GetRenderViewHost to return the new host, instead
 445       // of the one that may have just been swapped out.
 446       if (delegate_->CanOverscrollContent()) {
 447         // Don't take screenshots if we are staying on the same page. We want
 448         // in-page navigations to be super fast, and taking a screenshot
 449         // currently blocks GPU for a longer time than we are willing to
 450         // tolerate in this use case.
 451         if (!params.was_within_same_page)
 452           controller_->TakeScreenshot();
 453       }
 454
 455       // Run tasks that must execute just before the commit.
 456       bool is_navigation_within_page = controller_->IsURLInPageNavigation(
 457           params.url, params.was_within_same_page, render_frame_host);
 458       delegate_->DidNavigateMainFramePreCommit(is_navigation_within_page);
 459     }
 460
 461     if (!use_site_per_process)
 462       frame_tree->root()->render_manager()->DidNavigateFrame(
 463           render_frame_host, params.gesture == NavigationGestureUser);
 464   }
 465
 466   // Save the origin of the new page.  Do this before calling
 467   // DidNavigateFrame(), because the origin needs to be included in the SwapOut
 468   // message, which is sent inside DidNavigateFrame().  SwapOut needs the
 469   // origin because it creates a RenderFrameProxy that needs this to initialize
 470   // its security context. This origin will also be sent to RenderFrameProxies
 471   // created via ViewMsg_New and FrameMsg_NewFrameProxy.
 472   render_frame_host->frame_tree_node()->set_current_origin(params.origin);
 473
 474   // When using --site-per-process, we notify the RFHM for all navigations,
 475   // not just main frame navigations.
 476   if (use_site_per_process) {
 477     FrameTreeNode* frame = render_frame_host->frame_tree_node();
 478     frame->render_manager()->DidNavigateFrame(
 479         render_frame_host, params.gesture == NavigationGestureUser);
 480   }
 481
 482   // Update the site of the SiteInstance if it doesn't have one yet, unless
 483   // assigning a site is not necessary for this URL.  In that case, the
 484   // SiteInstance can still be considered unused until a navigation to a real
 485   // page.
 486   SiteInstanceImpl* site_instance = render_frame_host->GetSiteInstance();
 487   if (!site_instance->HasSite() &&
 488       ShouldAssignSiteForURL(params.url)) {
 489     site_instance->SetSite(params.url);
 490   }
 491
 492   // Need to update MIME type here because it's referred to in
 493   // UpdateNavigationCommands() called by RendererDidNavigate() to
 494   // determine whether or not to enable the encoding menu.
 495   // It's updated only for the main frame. For a subframe,
 496   // RenderView::UpdateURL does not set params.contents_mime_type.
 497   // (see http://code.google.com/p/chromium/issues/detail?id=2929 )
 498   // TODO(jungshik): Add a test for the encoding menu to avoid
 499   // regressing it again.
 500   // TODO(nasko): Verify the correctness of the above comment, since some of the
 501   // code doesn't exist anymore. Also, move this code in the
 502   // PageTransitionIsMainFrame code block above.
 503   if (ui::PageTransitionIsMainFrame(params.transition) && delegate_)
 504     delegate_->SetMainFrameMimeType(params.contents_mime_type);
 505
 506   LoadCommittedDetails details;
 507   bool did_navigate = controller_->RendererDidNavigate(render_frame_host,
 508                                                        params, &details);
 509
 510   // For now, keep track of each frame's URL in its FrameTreeNode.  This lets
 511   // us estimate our process count for implementing OOP iframes.
 512   // TODO(creis): Remove this when we track which pages commit in each frame.
 513   render_frame_host->frame_tree_node()->set_current_url(params.url);
 514
 515   // Send notification about committed provisional loads. This notification is
 516   // different from the NAV_ENTRY_COMMITTED notification which doesn't include
 517   // the actual URL navigated to and isn't sent for AUTO_SUBFRAME navigations.
 518   if (details.type != NAVIGATION_TYPE_NAV_IGNORE && delegate_) {
 519     DCHECK_EQ(!render_frame_host->GetParent(),
 520               did_navigate ? details.is_main_frame : false);
 521     ui::PageTransition transition_type = params.transition;
 522     // Whether or not a page transition was triggered by going backward or
 523     // forward in the history is only stored in the navigation controller's
 524     // entry list.
 525     if (did_navigate &&
 526         (controller_->GetLastCommittedEntry()->GetTransitionType() &
 527             ui::PAGE_TRANSITION_FORWARD_BACK)) {
 528       transition_type = ui::PageTransitionFromInt(
 529           params.transition | ui::PAGE_TRANSITION_FORWARD_BACK);
 530     }
 531
 532     delegate_->DidCommitProvisionalLoad(render_frame_host,
 533                                         params.url,
 534                                         transition_type);
 535   }
 536
 537   if (!did_navigate)
 538     return;  // No navigation happened.
 539
 540   // DO NOT ADD MORE STUFF TO THIS FUNCTION! Your component should either listen
 541   // for the appropriate notification (best) or you can add it to
 542   // DidNavigateMainFramePostCommit / DidNavigateAnyFramePostCommit (only if
 543   // necessary, please).
 544
 545   // TODO(carlosk): Move this out when PlzNavigate implementation properly calls
 546   // the observer methods.
 547   RecordNavigationMetrics(details, params, site_instance);
 548
 549   // Run post-commit tasks.
 550   if (delegate_) {
 551     if (details.is_main_frame) {
 552       delegate_->DidNavigateMainFramePostCommit(render_frame_host,
 553                                                 details, params);
 554     }
 555
 556     delegate_->DidNavigateAnyFramePostCommit(
 557         render_frame_host, details, params);
 558   }
 559 }
 560
 561 bool NavigatorImpl::ShouldAssignSiteForURL(const GURL& url) {
 562   // about:blank should not "use up" a new SiteInstance.  The SiteInstance can
 563   // still be used for a normal web site.
 564   if (url == GURL(url::kAboutBlankURL))
 565     return false;
 566
 567   // The embedder will then have the opportunity to determine if the URL
 568   // should "use up" the SiteInstance.
 569   return GetContentClient()->browser()->ShouldAssignSiteForURL(url);
 570 }
 571
 572 void NavigatorImpl::RequestOpenURL(RenderFrameHostImpl* render_frame_host,
 573                                    const GURL& url,
 574                                    SiteInstance* source_site_instance,
 575                                    const Referrer& referrer,
 576                                    WindowOpenDisposition disposition,
 577                                    bool should_replace_current_entry,
 578                                    bool user_gesture) {
 579   SiteInstance* current_site_instance =
 580       GetRenderManager(render_frame_host)->current_frame_host()->
 581           GetSiteInstance();
 582   // If this came from a swapped out RenderFrameHost, we only allow the request
 583   // if we are still in the same BrowsingInstance.
 584   // TODO(creis): Move this to RenderFrameProxyHost::OpenURL.
 585   if (render_frame_host->is_swapped_out() &&
 586       !render_frame_host->GetSiteInstance()->IsRelatedSiteInstance(
 587           current_site_instance)) {
 588     return;
 589   }
 590
 591   // Delegate to RequestTransferURL because this is just the generic
 592   // case where |old_request_id| is empty.
 593   // TODO(creis): Pass the redirect_chain into this method to support client
 594   // redirects.  http://crbug.com/311721.
 595   std::vector<GURL> redirect_chain;
 596   RequestTransferURL(render_frame_host, url, source_site_instance,
 597                      redirect_chain, referrer, ui::PAGE_TRANSITION_LINK,
 598                      disposition, GlobalRequestID(),
 599                      should_replace_current_entry, user_gesture);
 600 }
 601
 602 void NavigatorImpl::RequestTransferURL(
 603     RenderFrameHostImpl* render_frame_host,
 604     const GURL& url,
 605     SiteInstance* source_site_instance,
 606     const std::vector<GURL>& redirect_chain,
 607     const Referrer& referrer,
 608     ui::PageTransition page_transition,
 609     WindowOpenDisposition disposition,
 610     const GlobalRequestID& transferred_global_request_id,
 611     bool should_replace_current_entry,
 612     bool user_gesture) {
 613   GURL dest_url(url);
 614   SiteInstance* current_site_instance =
 615       GetRenderManager(render_frame_host)->current_frame_host()->
 616           GetSiteInstance();
 617   if (!GetContentClient()->browser()->ShouldAllowOpenURL(
 618           current_site_instance, url)) {
 619     dest_url = GURL(url::kAboutBlankURL);
 620   }
 621
 622   int64 frame_tree_node_id = -1;
 623   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 624           switches::kSitePerProcess)) {
 625     frame_tree_node_id =
 626         render_frame_host->frame_tree_node()->frame_tree_node_id();
 627   }
 628   OpenURLParams params(
 629       dest_url, referrer, frame_tree_node_id, disposition, page_transition,
 630       true /* is_renderer_initiated */);
 631   params.source_site_instance = source_site_instance;
 632   if (redirect_chain.size() > 0)
 633     params.redirect_chain = redirect_chain;
 634   params.transferred_global_request_id = transferred_global_request_id;
 635   params.should_replace_current_entry = should_replace_current_entry;
 636   params.user_gesture = user_gesture;
 637
 638   if (GetRenderManager(render_frame_host)->web_ui()) {
 639     // Web UI pages sometimes want to override the page transition type for
 640     // link clicks (e.g., so the new tab page can specify AUTO_BOOKMARK for
 641     // automatically generated suggestions).  We don't override other types
 642     // like TYPED because they have different implications (e.g., autocomplete).
 643     if (ui::PageTransitionCoreTypeIs(
 644         params.transition, ui::PAGE_TRANSITION_LINK))
 645       params.transition =
 646           GetRenderManager(render_frame_host)->web_ui()->
 647               GetLinkTransitionType();
 648
 649     // Note also that we hide the referrer for Web UI pages. We don't really
 650     // want web sites to see a referrer of "chrome://blah" (and some
 651     // chrome: URLs might have search terms or other stuff we don't want to
 652     // send to the site), so we send no referrer.
 653     params.referrer = Referrer();
 654
 655     // Navigations in Web UI pages count as browser-initiated navigations.
 656     params.is_renderer_initiated = false;
 657   }
 658
 659   if (delegate_)
 660     delegate_->RequestOpenURL(render_frame_host, params);
 661 }
 662
 663 // PlzNavigate
 664 void NavigatorImpl::OnBeforeUnloadACK(FrameTreeNode* frame_tree_node,
 665                                       bool proceed) {
 666   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 667       switches::kEnableBrowserSideNavigation));
 668   DCHECK(frame_tree_node);
 669
 670   NavigationRequest* navigation_request =
 671       navigation_request_map_.get(frame_tree_node->frame_tree_node_id());
 672
 673   // The NavigationRequest may have been canceled while the renderer was
 674   // executing the BeforeUnload event.
 675   if (!navigation_request)
 676     return;
 677
 678   DCHECK_EQ(NavigationRequest::WAITING_FOR_RENDERER_RESPONSE,
 679             navigation_request->state());
 680
 681   if (proceed)
 682     BeginNavigation(frame_tree_node);
 683   else
 684     CancelNavigation(frame_tree_node);
 685 }
 686
 687 // PlzNavigate
 688 void NavigatorImpl::OnBeginNavigation(
 689     FrameTreeNode* frame_tree_node,
 690     const CommonNavigationParams& common_params,
 691     const BeginNavigationParams& begin_params,
 692     scoped_refptr<ResourceRequestBody> body) {
 693   // This is a renderer-initiated navigation.
 694   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 695       switches::kEnableBrowserSideNavigation));
 696   DCHECK(frame_tree_node);
 697
 698   NavigationRequest* ongoing_navigation_request =
 699       navigation_request_map_.get(frame_tree_node->frame_tree_node_id());
 700
 701   // The renderer-initiated navigation request is ignored iff a) there is an
 702   // ongoing request b) which is browser or user-initiated and c) the renderer
 703   // request is not user-initiated.
 704   if (ongoing_navigation_request &&
 705       (ongoing_navigation_request->browser_initiated() ||
 706        ongoing_navigation_request->begin_params().has_user_gesture) &&
 707       !begin_params.has_user_gesture) {
 708     return;
 709   }
 710
 711   // In all other cases the current navigation, if any, is canceled and a new
 712   // NavigationRequest is created and stored in the map. Actual cancellation
 713   // happens when the existing request map entry is replaced and destroyed.
 714   scoped_ptr<NavigationRequest> navigation_request =
 715       NavigationRequest::CreateRendererInitiated(
 716           frame_tree_node, common_params, begin_params, body);
 717   navigation_request_map_.set(
 718       frame_tree_node->frame_tree_node_id(), navigation_request.Pass());
 719
 720   if (frame_tree_node->IsMainFrame())
 721     navigation_data_.reset();
 722
 723   BeginNavigation(frame_tree_node);
 724 }
 725
 726 // PlzNavigate
 727 void NavigatorImpl::CommitNavigation(FrameTreeNode* frame_tree_node,
 728                                      ResourceResponse* response,
 729                                      scoped_ptr<StreamHandle> body) {
 730   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 731       switches::kEnableBrowserSideNavigation));
 732
 733   NavigationRequest* navigation_request =
 734       navigation_request_map_.get(frame_tree_node->frame_tree_node_id());
 735   DCHECK(navigation_request);
 736   DCHECK(response ||
 737          !NavigationRequest::ShouldMakeNetworkRequest(
 738              navigation_request->common_params().url));
 739
 740   // HTTP 204 (No Content) and HTTP 205 (Reset Content) responses should not
 741   // commit; they leave the frame showing the previous page.
 742   if (response && response->head.headers.get() &&
 743       (response->head.headers->response_code() == 204 ||
 744        response->head.headers->response_code() == 205)) {
 745     CancelNavigation(frame_tree_node);
 746     return;
 747   }
 748
 749   // Select an appropriate renderer to commit the navigation.
 750   RenderFrameHostImpl* render_frame_host =
 751       frame_tree_node->render_manager()->GetFrameHostForNavigation(
 752           *navigation_request);
 753   CheckWebUIRendererDoesNotDisplayNormalURL(
 754       render_frame_host, navigation_request->common_params().url);
 755
 756   render_frame_host->CommitNavigation(response, body.Pass(),
 757                                       navigation_request->common_params(),
 758                                       navigation_request->commit_params());
 759 }
 760
 761 // PlzNavigate
 762 void NavigatorImpl::CancelNavigation(FrameTreeNode* frame_tree_node) {
 763   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 764       switches::kEnableBrowserSideNavigation));
 765   navigation_request_map_.erase(frame_tree_node->frame_tree_node_id());
 766   if (frame_tree_node->IsMainFrame())
 767     navigation_data_.reset();
 768   // TODO(carlosk): move this cleanup into the NavigationRequest destructor once
 769   // we properly cancel ongoing navigations.
 770   frame_tree_node->render_manager()->CleanUpNavigation();
 771 }
 772
 773 // PlzNavigate
 774 NavigationRequest* NavigatorImpl::GetNavigationRequestForNodeForTesting(
 775     FrameTreeNode* frame_tree_node) {
 776   return navigation_request_map_.get(frame_tree_node->frame_tree_node_id());
 777 }
 778
 779 bool NavigatorImpl::IsWaitingForBeforeUnloadACK(
 780     FrameTreeNode* frame_tree_node) {
 781   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 782       switches::kEnableBrowserSideNavigation));
 783   NavigationRequest* request =
 784       navigation_request_map_.get(frame_tree_node->frame_tree_node_id());
 785   if (!request)
 786     return false;
 787   return request->state() == NavigationRequest::WAITING_FOR_RENDERER_RESPONSE;
 788 }
 789
 790 void NavigatorImpl::LogResourceRequestTime(
 791     base::TimeTicks timestamp, const GURL& url) {
 792   if (navigation_data_ && navigation_data_->url_ == url) {
 793     navigation_data_->url_job_start_time_ = timestamp;
 794     UMA_HISTOGRAM_TIMES(
 795         "Navigation.TimeToURLJobStart",
 796         navigation_data_->url_job_start_time_ - navigation_data_->start_time_);
 797   }
 798 }
 799
 800 void NavigatorImpl::LogBeforeUnloadTime(
 801     const base::TimeTicks& renderer_before_unload_start_time,
 802     const base::TimeTicks& renderer_before_unload_end_time) {
 803   // Only stores the beforeunload delay if we're tracking a browser initiated
 804   // navigation and it happened later than the navigation request.
 805   if (navigation_data_ &&
 806       renderer_before_unload_start_time > navigation_data_->start_time_) {
 807     navigation_data_->before_unload_delay_ =
 808         renderer_before_unload_end_time - renderer_before_unload_start_time;
 809   }
 810 }
 811
 812 void NavigatorImpl::CheckWebUIRendererDoesNotDisplayNormalURL(
 813     RenderFrameHostImpl* render_frame_host,
 814     const GURL& url) {
 815   int enabled_bindings =
 816       render_frame_host->render_view_host()->GetEnabledBindings();
 817   bool is_allowed_in_web_ui_renderer =
 818       WebUIControllerFactoryRegistry::GetInstance()->IsURLAcceptableForWebUI(
 819           controller_->GetBrowserContext(), url);
 820   if ((enabled_bindings & BINDINGS_POLICY_WEB_UI) &&
 821       !is_allowed_in_web_ui_renderer) {
 822     // Log the URL to help us diagnose any future failures of this CHECK.
 823     GetContentClient()->SetActiveURL(url);
 824     CHECK(0);
 825   }
 826 }
 827
 828 // PlzNavigate
 829 void NavigatorImpl::RequestNavigation(
 830     FrameTreeNode* frame_tree_node,
 831     const NavigationEntryImpl& entry,
 832     NavigationController::ReloadType reload_type,
 833     base::TimeTicks navigation_start) {
 834   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 835       switches::kEnableBrowserSideNavigation));
 836   DCHECK(frame_tree_node);
 837   int64 frame_tree_node_id = frame_tree_node->frame_tree_node_id();
 838   FrameMsg_Navigate_Type::Value navigation_type =
 839       GetNavigationType(controller_->GetBrowserContext(), entry, reload_type);
 840   scoped_ptr<NavigationRequest> navigation_request =
 841       NavigationRequest::CreateBrowserInitiated(
 842           frame_tree_node, entry, navigation_type, navigation_start);
 843   // TODO(clamy): Check if navigations are blocked and if so store the
 844   // parameters.
 845
 846   // If there is an ongoing request, replace it.
 847   navigation_request_map_.set(frame_tree_node_id, navigation_request.Pass());
 848
 849   // Have the current renderer execute its beforeUnload event if needed. If it
 850   // is not needed (eg. the renderer is not live), BeginNavigation should get
 851   // called.
 852   NavigationRequest* request_to_send =
 853       navigation_request_map_.get(frame_tree_node_id);
 854   request_to_send->SetWaitingForRendererResponse();
 855   frame_tree_node->current_frame_host()->DispatchBeforeUnload(true);
 856 }
 857
 858 void NavigatorImpl::BeginNavigation(FrameTreeNode* frame_tree_node) {
 859   NavigationRequest* navigation_request =
 860       navigation_request_map_.get(frame_tree_node->frame_tree_node_id());
 861
 862   // A browser-initiated navigation could have been cancelled while it was
 863   // waiting for the BeforeUnload event to execute.
 864   if (!navigation_request)
 865     return;
 866
 867   // Start the request.
 868    if (navigation_request->BeginNavigation()) {
 869     // If the request was sent to the IO thread, notify the
 870     // RenderFrameHostManager so it can speculatively create a RenderFrameHost
 871     // (and potentially a new renderer process) in parallel.
 872     frame_tree_node->render_manager()->BeginNavigation(*navigation_request);
 873   }
 874 }
 875
 876 void NavigatorImpl::RecordNavigationMetrics(
 877     const LoadCommittedDetails& details,
 878     const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
 879     SiteInstance* site_instance) {
 880   DCHECK(site_instance->HasProcess());
 881
 882   if (!details.is_in_page)
 883     RecordAction(base::UserMetricsAction("FrameLoad"));
 884
 885   if (!details.is_main_frame || !navigation_data_ ||
 886       navigation_data_->url_job_start_time_.is_null() ||
 887       navigation_data_->url_ != params.original_request_url) {
 888     return;
 889   }
 890
 891   base::TimeDelta time_to_commit =
 892       base::TimeTicks::Now() - navigation_data_->start_time_;
 893   UMA_HISTOGRAM_TIMES("Navigation.TimeToCommit", time_to_commit);
 894
 895   time_to_commit -= navigation_data_->before_unload_delay_;
 896   base::TimeDelta time_to_network = navigation_data_->url_job_start_time_ -
 897                                     navigation_data_->start_time_ -
 898                                     navigation_data_->before_unload_delay_;
 899   if (navigation_data_->is_restoring_from_last_session_) {
 900     UMA_HISTOGRAM_TIMES(
 901         "Navigation.TimeToCommit_SessionRestored_BeforeUnloadDiscounted",
 902         time_to_commit);
 903     UMA_HISTOGRAM_TIMES(
 904         "Navigation.TimeToURLJobStart_SessionRestored_BeforeUnloadDiscounted",
 905         time_to_network);
 906     navigation_data_.reset();
 907     return;
 908   }
 909   bool navigation_created_new_renderer_process =
 910       site_instance->GetProcess()->GetInitTimeForNavigationMetrics() >
 911       navigation_data_->start_time_;
 912   if (navigation_created_new_renderer_process) {
 913     UMA_HISTOGRAM_TIMES(
 914         "Navigation.TimeToCommit_NewRenderer_BeforeUnloadDiscounted",
 915         time_to_commit);
 916     UMA_HISTOGRAM_TIMES(
 917         "Navigation.TimeToURLJobStart_NewRenderer_BeforeUnloadDiscounted",
 918         time_to_network);
 919   } else {
 920     UMA_HISTOGRAM_TIMES(
 921         "Navigation.TimeToCommit_ExistingRenderer_BeforeUnloadDiscounted",
 922         time_to_commit);
 923     UMA_HISTOGRAM_TIMES(
 924         "Navigation.TimeToURLJobStart_ExistingRenderer_BeforeUnloadDiscounted",
 925         time_to_network);
 926   }
 927   navigation_data_.reset();
 928 }
 929
 930 }  // namespace content