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_handle_impl.h"
  15 #include "content/browser/frame_host/navigation_request.h"
  16 #include "content/browser/frame_host/navigation_request_info.h"
  17 #include "content/browser/frame_host/navigator_delegate.h"
  18 #include "content/browser/frame_host/render_frame_host_impl.h"
  19 #include "content/browser/renderer_host/render_view_host_impl.h"
  20 #include "content/browser/site_instance_impl.h"
  21 #include "content/browser/webui/web_ui_controller_factory_registry.h"
  22 #include "content/browser/webui/web_ui_impl.h"
  23 #include "content/common/frame_messages.h"
  24 #include "content/common/navigation_params.h"
  25 #include "content/common/site_isolation_policy.h"
  26 #include "content/common/view_messages.h"
  27 #include "content/public/browser/browser_context.h"
  28 #include "content/public/browser/content_browser_client.h"
  29 #include "content/public/browser/global_request_id.h"
  30 #include "content/public/browser/invalidate_type.h"
  31 #include "content/public/browser/navigation_controller.h"
  32 #include "content/public/browser/navigation_details.h"
  33 #include "content/public/browser/page_navigator.h"
  34 #include "content/public/browser/render_view_host.h"
  35 #include "content/public/browser/stream_handle.h"
  36 #include "content/public/browser/user_metrics.h"
  37 #include "content/public/common/bindings_policy.h"
  38 #include "content/public/common/content_client.h"
  39 #include "content/public/common/content_switches.h"
  40 #include "content/public/common/resource_response.h"
  41 #include "content/public/common/url_constants.h"
  42 #include "content/public/common/url_utils.h"
  43 #include "net/base/net_errors.h"
  44
  45 namespace content {
  46
  47 namespace {
  48
  49 FrameMsg_Navigate_Type::Value GetNavigationType(
  50     BrowserContext* browser_context, const NavigationEntryImpl& entry,
  51     NavigationController::ReloadType reload_type) {
  52   switch (reload_type) {
  53     case NavigationControllerImpl::RELOAD:
  54       return FrameMsg_Navigate_Type::RELOAD;
  55     case NavigationControllerImpl::RELOAD_IGNORING_CACHE:
  56       return FrameMsg_Navigate_Type::RELOAD_IGNORING_CACHE;
  57     case NavigationControllerImpl::RELOAD_ORIGINAL_REQUEST_URL:
  58       return FrameMsg_Navigate_Type::RELOAD_ORIGINAL_REQUEST_URL;
  59     case NavigationControllerImpl::NO_RELOAD:
  60       break;  // Fall through to rest of function.
  61   }
  62
  63   // |RenderViewImpl::PopulateStateFromPendingNavigationParams| differentiates
  64   // between |RESTORE_WITH_POST| and |RESTORE|.
  65   if (entry.restore_type() ==
  66       NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY) {
  67     if (entry.GetHasPostData())
  68       return FrameMsg_Navigate_Type::RESTORE_WITH_POST;
  69     return FrameMsg_Navigate_Type::RESTORE;
  70   }
  71
  72   return FrameMsg_Navigate_Type::NORMAL;
  73 }
  74
  75 RenderFrameHostManager* GetRenderManager(RenderFrameHostImpl* rfh) {
  76   if (SiteIsolationPolicy::AreCrossProcessFramesPossible())
  77     return rfh->frame_tree_node()->render_manager();
  78
  79   return rfh->frame_tree_node()->frame_tree()->root()->render_manager();
  80 }
  81
  82 }  // namespace
  83
  84 struct NavigatorImpl::NavigationMetricsData {
  85   NavigationMetricsData(base::TimeTicks start_time,
  86                         GURL url,
  87                         NavigationEntryImpl::RestoreType restore_type)
  88       : start_time_(start_time), url_(url) {
  89     is_restoring_from_last_session_ =
  90         (restore_type ==
  91              NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY ||
  92          restore_type == NavigationEntryImpl::RESTORE_LAST_SESSION_CRASHED);
  93   }
  94
  95   base::TimeTicks start_time_;
  96   GURL url_;
  97   bool is_restoring_from_last_session_;
  98   base::TimeTicks url_job_start_time_;
  99   base::TimeDelta before_unload_delay_;
 100 };
 101
 102 NavigatorImpl::NavigatorImpl(
 103     NavigationControllerImpl* navigation_controller,
 104     NavigatorDelegate* delegate)
 105     : controller_(navigation_controller),
 106       delegate_(delegate) {
 107 }
 108
 109 NavigatorImpl::~NavigatorImpl() {}
 110
 111 NavigatorDelegate* NavigatorImpl::GetDelegate() {
 112   return delegate_;
 113 }
 114
 115 NavigationController* NavigatorImpl::GetController() {
 116   return controller_;
 117 }
 118
 119 void NavigatorImpl::DidStartProvisionalLoad(
 120     RenderFrameHostImpl* render_frame_host,
 121     const GURL& url) {
 122   bool is_main_frame = render_frame_host->frame_tree_node()->IsMainFrame();
 123   bool is_error_page = (url.spec() == kUnreachableWebDataURL);
 124   bool is_iframe_srcdoc = (url.spec() == kAboutSrcDocURL);
 125   GURL validated_url(url);
 126   RenderProcessHost* render_process_host = render_frame_host->GetProcess();
 127   render_process_host->FilterURL(false, &validated_url);
 128
 129   if (is_main_frame && !is_error_page) {
 130     DidStartMainFrameNavigation(validated_url,
 131                                 render_frame_host->GetSiteInstance());
 132   }
 133
 134   if (delegate_) {
 135     // Notify the observer about the start of the provisional load.
 136     delegate_->DidStartProvisionalLoad(render_frame_host, validated_url,
 137                                        is_error_page, is_iframe_srcdoc);
 138   }
 139
 140   if (is_error_page ||
 141       base::CommandLine::ForCurrentProcess()->HasSwitch(
 142           switches::kEnableBrowserSideNavigation)) {
 143     return;
 144   }
 145
 146   if (render_frame_host->navigation_handle()) {
 147     if (render_frame_host->navigation_handle()->is_transferring()) {
 148       // If the navigation is completing a transfer, this
 149       // DidStartProvisionalLoad should not correspond to a new navigation.
 150       DCHECK_EQ(url, render_frame_host->navigation_handle()->GetURL());
 151       render_frame_host->navigation_handle()->set_is_transferring(false);
 152       return;
 153     }
 154
 155     // This ensures that notifications about the end of the previous
 156     // navigation are sent before notifications about the start of the
 157     // new navigation.
 158     render_frame_host->SetNavigationHandle(scoped_ptr<NavigationHandleImpl>());
 159   }
 160
 161   render_frame_host->SetNavigationHandle(
 162       NavigationHandleImpl::Create(url, is_main_frame, delegate_));
 163 }
 164
 165 void NavigatorImpl::DidFailProvisionalLoadWithError(
 166     RenderFrameHostImpl* render_frame_host,
 167     const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {
 168   VLOG(1) << "Failed Provisional Load: " << params.url.possibly_invalid_spec()
 169           << ", error_code: " << params.error_code
 170           << ", error_description: " << params.error_description
 171           << ", showing_repost_interstitial: " <<
 172             params.showing_repost_interstitial
 173           << ", frame_id: " << render_frame_host->GetRoutingID();
 174   GURL validated_url(params.url);
 175   RenderProcessHost* render_process_host = render_frame_host->GetProcess();
 176   render_process_host->FilterURL(false, &validated_url);
 177
 178   if (net::ERR_ABORTED == params.error_code) {
 179     // EVIL HACK ALERT! Ignore failed loads when we're showing interstitials.
 180     // This means that the interstitial won't be torn down properly, which is
 181     // bad. But if we have an interstitial, go back to another tab type, and
 182     // then load the same interstitial again, we could end up getting the first
 183     // interstitial's "failed" message (as a result of the cancel) when we're on
 184     // the second one. We can't tell this apart, so we think we're tearing down
 185     // the current page which will cause a crash later on.
 186     //
 187     // http://code.google.com/p/chromium/issues/detail?id=2855
 188     // Because this will not tear down the interstitial properly, if "back" is
 189     // back to another tab type, the interstitial will still be somewhat alive
 190     // in the previous tab type. If you navigate somewhere that activates the
 191     // tab with the interstitial again, you'll see a flash before the new load
 192     // commits of the interstitial page.
 193     FrameTreeNode* root =
 194         render_frame_host->frame_tree_node()->frame_tree()->root();
 195     if (root->render_manager()->interstitial_page() != NULL) {
 196       LOG(WARNING) << "Discarding message during interstitial.";
 197       return;
 198     }
 199
 200     // We used to cancel the pending renderer here for cross-site downloads.
 201     // However, it's not safe to do that because the download logic repeatedly
 202     // looks for this WebContents based on a render ID.  Instead, we just
 203     // leave the pending renderer around until the next navigation event
 204     // (Navigate, DidNavigate, etc), which will clean it up properly.
 205     //
 206     // TODO(creis): Find a way to cancel any pending RFH here.
 207   }
 208
 209   // We usually clear the pending entry when it fails, so that an arbitrary URL
 210   // isn't left visible above a committed page.  This must be enforced when
 211   // the pending entry isn't visible (e.g., renderer-initiated navigations) to
 212   // prevent URL spoofs for in-page navigations that don't go through
 213   // DidStartProvisionalLoadForFrame.
 214   //
 215   // However, we do preserve the pending entry in some cases, such as on the
 216   // initial navigation of an unmodified blank tab.  We also allow the delegate
 217   // to say when it's safe to leave aborted URLs in the omnibox, to let the user
 218   // edit the URL and try again.  This may be useful in cases that the committed
 219   // page cannot be attacker-controlled.  In these cases, we still allow the
 220   // view to clear the pending entry and typed URL if the user requests
 221   // (e.g., hitting Escape with focus in the address bar).
 222   //
 223   // Note: don't touch the transient entry, since an interstitial may exist.
 224   bool should_preserve_entry = controller_->IsUnmodifiedBlankTab() ||
 225       delegate_->ShouldPreserveAbortedURLs();
 226   if (controller_->GetPendingEntry() != controller_->GetVisibleEntry() ||
 227       !should_preserve_entry) {
 228     controller_->DiscardPendingEntry(true);
 229
 230     // Also force the UI to refresh.
 231     controller_->delegate()->NotifyNavigationStateChanged(INVALIDATE_TYPE_URL);
 232   }
 233
 234   if (delegate_)
 235     delegate_->DidFailProvisionalLoadWithError(render_frame_host, params);
 236 }
 237
 238 void NavigatorImpl::DidFailLoadWithError(
 239     RenderFrameHostImpl* render_frame_host,
 240     const GURL& url,
 241     int error_code,
 242     const base::string16& error_description,
 243     bool was_ignored_by_handler) {
 244   if (delegate_) {
 245     delegate_->DidFailLoadWithError(
 246         render_frame_host, url, error_code,
 247         error_description, was_ignored_by_handler);
 248   }
 249 }
 250
 251 bool NavigatorImpl::NavigateToEntry(
 252     FrameTreeNode* frame_tree_node,
 253     const FrameNavigationEntry& frame_entry,
 254     const NavigationEntryImpl& entry,
 255     NavigationController::ReloadType reload_type,
 256     bool is_same_document_history_load) {
 257   TRACE_EVENT0("browser,navigation", "NavigatorImpl::NavigateToEntry");
 258
 259   GURL dest_url = frame_entry.url();
 260   Referrer dest_referrer = frame_entry.referrer();
 261   if (reload_type ==
 262           NavigationController::ReloadType::RELOAD_ORIGINAL_REQUEST_URL &&
 263       entry.GetOriginalRequestURL().is_valid() && !entry.GetHasPostData()) {
 264     // We may have been redirected when navigating to the current URL.
 265     // Use the URL the user originally intended to visit, if it's valid and if a
 266     // POST wasn't involved; the latter case avoids issues with sending data to
 267     // the wrong page.
 268     dest_url = entry.GetOriginalRequestURL();
 269     dest_referrer = Referrer();
 270   }
 271
 272   // The renderer will reject IPC messages with URLs longer than
 273   // this limit, so don't attempt to navigate with a longer URL.
 274   if (dest_url.spec().size() > GetMaxURLChars()) {
 275     LOG(WARNING) << "Refusing to load URL as it exceeds " << GetMaxURLChars()
 276                  << " characters.";
 277     return false;
 278   }
 279
 280   // This will be used to set the Navigation Timing API navigationStart
 281   // parameter for browser navigations in new tabs (intents, tabs opened through
 282   // "Open link in new tab"). We need to keep it above RFHM::Navigate() call to
 283   // capture the time needed for the RenderFrameHost initialization.
 284   base::TimeTicks navigation_start = base::TimeTicks::Now();
 285
 286   RenderFrameHostManager* manager = frame_tree_node->render_manager();
 287
 288   // PlzNavigate: the RenderFrameHosts are no longer asked to navigate.
 289   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 290           switches::kEnableBrowserSideNavigation)) {
 291     navigation_data_.reset(new NavigationMetricsData(navigation_start, dest_url,
 292                                                      entry.restore_type()));
 293     RequestNavigation(frame_tree_node, dest_url, dest_referrer, frame_entry,
 294                       entry, reload_type, is_same_document_history_load,
 295                       navigation_start);
 296
 297     // Notify observers about navigation.
 298     if (delegate_)
 299       delegate_->DidStartNavigationToPendingEntry(dest_url, reload_type);
 300
 301     return true;
 302   }
 303
 304   RenderFrameHostImpl* dest_render_frame_host =
 305       manager->Navigate(dest_url, frame_entry, entry);
 306   if (!dest_render_frame_host)
 307     return false;  // Unable to create the desired RenderFrameHost.
 308
 309   // Make sure no code called via RFHM::Navigate clears the pending entry.
 310   CHECK_EQ(controller_->GetPendingEntry(), &entry);
 311
 312   // For security, we should never send non-Web-UI URLs to a Web UI renderer.
 313   // Double check that here.
 314   CheckWebUIRendererDoesNotDisplayNormalURL(dest_render_frame_host, dest_url);
 315
 316   // Notify observers that we will navigate in this RenderFrame.
 317   if (delegate_) {
 318     delegate_->AboutToNavigateRenderFrame(frame_tree_node->current_frame_host(),
 319                                           dest_render_frame_host);
 320   }
 321
 322   // Navigate in the desired RenderFrameHost.
 323   // We can skip this step in the rare case that this is a transfer navigation
 324   // which began in the chosen RenderFrameHost, since the request has already
 325   // been issued.  In that case, simply resume the response.
 326   bool is_transfer_to_same =
 327       entry.transferred_global_request_id().child_id != -1 &&
 328       entry.transferred_global_request_id().child_id ==
 329           dest_render_frame_host->GetProcess()->GetID();
 330   if (!is_transfer_to_same) {
 331     navigation_data_.reset(new NavigationMetricsData(navigation_start, dest_url,
 332                                                      entry.restore_type()));
 333     // Create the navigation parameters.
 334     FrameMsg_Navigate_Type::Value navigation_type =
 335         GetNavigationType(controller_->GetBrowserContext(), entry, reload_type);
 336     dest_render_frame_host->Navigate(
 337         entry.ConstructCommonNavigationParams(dest_url, dest_referrer,
 338                                               frame_entry, navigation_type),
 339         entry.ConstructStartNavigationParams(),
 340         entry.ConstructRequestNavigationParams(
 341             frame_entry, navigation_start, is_same_document_history_load,
 342             frame_tree_node->has_committed_real_load(),
 343             controller_->GetPendingEntryIndex() == -1,
 344             controller_->GetIndexOfEntry(&entry),
 345             controller_->GetLastCommittedEntryIndex(),
 346             controller_->GetEntryCount()));
 347   } else {
 348     // No need to navigate again.  Just resume the deferred request.
 349     dest_render_frame_host->GetProcess()->ResumeDeferredNavigation(
 350         entry.transferred_global_request_id());
 351   }
 352
 353   // Make sure no code called via RFH::Navigate clears the pending entry.
 354   CHECK_EQ(controller_->GetPendingEntry(), &entry);
 355
 356   if (controller_->GetPendingEntryIndex() == -1 &&
 357       dest_url.SchemeIs(url::kJavaScriptScheme)) {
 358     // If the pending entry index is -1 (which means a new navigation rather
 359     // than a history one), and the user typed in a javascript: URL, don't add
 360     // it to the session history.
 361     //
 362     // This is a hack. What we really want is to avoid adding to the history any
 363     // URL that doesn't generate content, and what would be great would be if we
 364     // had a message from the renderer telling us that a new page was not
 365     // created. The same message could be used for mailto: URLs and the like.
 366     return false;
 367   }
 368
 369   // Notify observers about navigation.
 370   if (delegate_) {
 371     delegate_->DidStartNavigationToPendingEntry(dest_url, reload_type);
 372   }
 373
 374   return true;
 375 }
 376
 377 bool NavigatorImpl::NavigateToPendingEntry(
 378     FrameTreeNode* frame_tree_node,
 379     const FrameNavigationEntry& frame_entry,
 380     NavigationController::ReloadType reload_type,
 381     bool is_same_document_history_load) {
 382   return NavigateToEntry(frame_tree_node, frame_entry,
 383                          *controller_->GetPendingEntry(), reload_type,
 384                          is_same_document_history_load);
 385 }
 386
 387 void NavigatorImpl::DidNavigate(
 388     RenderFrameHostImpl* render_frame_host,
 389     const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
 390   FrameTree* frame_tree = render_frame_host->frame_tree_node()->frame_tree();
 391   bool oopifs_possible = SiteIsolationPolicy::AreCrossProcessFramesPossible();
 392
 393   if (ui::PageTransitionIsMainFrame(params.transition)) {
 394     if (delegate_) {
 395       // When overscroll navigation gesture is enabled, a screenshot of the page
 396       // in its current state is taken so that it can be used during the
 397       // nav-gesture. It is necessary to take the screenshot here, before
 398       // calling RenderFrameHostManager::DidNavigateMainFrame, because that can
 399       // change WebContents::GetRenderViewHost to return the new host, instead
 400       // of the one that may have just been swapped out.
 401       if (delegate_->CanOverscrollContent()) {
 402         // Don't take screenshots if we are staying on the same page. We want
 403         // in-page navigations to be super fast, and taking a screenshot
 404         // currently blocks GPU for a longer time than we are willing to
 405         // tolerate in this use case.
 406         if (!params.was_within_same_page)
 407           controller_->TakeScreenshot();
 408       }
 409
 410       // Run tasks that must execute just before the commit.
 411       bool is_navigation_within_page = controller_->IsURLInPageNavigation(
 412           params.url, params.was_within_same_page, render_frame_host);
 413       delegate_->DidNavigateMainFramePreCommit(is_navigation_within_page);
 414     }
 415
 416     if (!oopifs_possible)
 417       frame_tree->root()->render_manager()->DidNavigateFrame(
 418           render_frame_host, params.gesture == NavigationGestureUser);
 419   }
 420
 421   // Save the origin of the new page.  Do this before calling
 422   // DidNavigateFrame(), because the origin needs to be included in the SwapOut
 423   // message, which is sent inside DidNavigateFrame().  SwapOut needs the
 424   // origin because it creates a RenderFrameProxy that needs this to initialize
 425   // its security context. This origin will also be sent to RenderFrameProxies
 426   // created via ViewMsg_New and FrameMsg_NewFrameProxy.
 427   render_frame_host->frame_tree_node()->SetCurrentOrigin(params.origin);
 428
 429   // When using --site-per-process, we notify the RFHM for all navigations,
 430   // not just main frame navigations.
 431   if (oopifs_possible) {
 432     FrameTreeNode* frame = render_frame_host->frame_tree_node();
 433     frame->render_manager()->DidNavigateFrame(
 434         render_frame_host, params.gesture == NavigationGestureUser);
 435   }
 436
 437   // Update the site of the SiteInstance if it doesn't have one yet, unless
 438   // assigning a site is not necessary for this URL.  In that case, the
 439   // SiteInstance can still be considered unused until a navigation to a real
 440   // page.
 441   SiteInstanceImpl* site_instance = render_frame_host->GetSiteInstance();
 442   if (!site_instance->HasSite() &&
 443       ShouldAssignSiteForURL(params.url)) {
 444     site_instance->SetSite(params.url);
 445   }
 446
 447   // Need to update MIME type here because it's referred to in
 448   // UpdateNavigationCommands() called by RendererDidNavigate() to
 449   // determine whether or not to enable the encoding menu.
 450   // It's updated only for the main frame. For a subframe,
 451   // RenderView::UpdateURL does not set params.contents_mime_type.
 452   // (see http://code.google.com/p/chromium/issues/detail?id=2929 )
 453   // TODO(jungshik): Add a test for the encoding menu to avoid
 454   // regressing it again.
 455   // TODO(nasko): Verify the correctness of the above comment, since some of the
 456   // code doesn't exist anymore. Also, move this code in the
 457   // PageTransitionIsMainFrame code block above.
 458   if (ui::PageTransitionIsMainFrame(params.transition) && delegate_)
 459     delegate_->SetMainFrameMimeType(params.contents_mime_type);
 460
 461   LoadCommittedDetails details;
 462   bool did_navigate = controller_->RendererDidNavigate(render_frame_host,
 463                                                        params, &details);
 464
 465   // Keep track of each frame's URL in its FrameTreeNode.
 466   render_frame_host->frame_tree_node()->SetCurrentURL(params.url);
 467
 468   // Send notification about committed provisional loads. This notification is
 469   // different from the NAV_ENTRY_COMMITTED notification which doesn't include
 470   // the actual URL navigated to and isn't sent for AUTO_SUBFRAME navigations.
 471   if (details.type != NAVIGATION_TYPE_NAV_IGNORE && delegate_) {
 472     DCHECK_EQ(!render_frame_host->GetParent(),
 473               did_navigate ? details.is_main_frame : false);
 474     ui::PageTransition transition_type = params.transition;
 475     // Whether or not a page transition was triggered by going backward or
 476     // forward in the history is only stored in the navigation controller's
 477     // entry list.
 478     if (did_navigate &&
 479         (controller_->GetLastCommittedEntry()->GetTransitionType() &
 480             ui::PAGE_TRANSITION_FORWARD_BACK)) {
 481       transition_type = ui::PageTransitionFromInt(
 482           params.transition | ui::PAGE_TRANSITION_FORWARD_BACK);
 483     }
 484
 485     delegate_->DidCommitProvisionalLoad(render_frame_host,
 486                                         params.url,
 487                                         transition_type);
 488     render_frame_host->navigation_handle()->DidCommitNavigation();
 489   }
 490
 491   if (!did_navigate)
 492     return;  // No navigation happened.
 493
 494   // DO NOT ADD MORE STUFF TO THIS FUNCTION! Your component should either listen
 495   // for the appropriate notification (best) or you can add it to
 496   // DidNavigateMainFramePostCommit / DidNavigateAnyFramePostCommit (only if
 497   // necessary, please).
 498
 499   // TODO(carlosk): Move this out when PlzNavigate implementation properly calls
 500   // the observer methods.
 501   RecordNavigationMetrics(details, params, site_instance);
 502
 503   // Run post-commit tasks.
 504   if (delegate_) {
 505     if (details.is_main_frame) {
 506       delegate_->DidNavigateMainFramePostCommit(render_frame_host,
 507                                                 details, params);
 508     }
 509
 510     delegate_->DidNavigateAnyFramePostCommit(
 511         render_frame_host, details, params);
 512   }
 513 }
 514
 515 bool NavigatorImpl::ShouldAssignSiteForURL(const GURL& url) {
 516   // about:blank should not "use up" a new SiteInstance.  The SiteInstance can
 517   // still be used for a normal web site.
 518   if (url == GURL(url::kAboutBlankURL))
 519     return false;
 520
 521   // The embedder will then have the opportunity to determine if the URL
 522   // should "use up" the SiteInstance.
 523   return GetContentClient()->browser()->ShouldAssignSiteForURL(url);
 524 }
 525
 526 void NavigatorImpl::RequestOpenURL(RenderFrameHostImpl* render_frame_host,
 527                                    const GURL& url,
 528                                    SiteInstance* source_site_instance,
 529                                    const Referrer& referrer,
 530                                    WindowOpenDisposition disposition,
 531                                    bool should_replace_current_entry,
 532                                    bool user_gesture) {
 533   SiteInstance* current_site_instance =
 534       GetRenderManager(render_frame_host)->current_frame_host()->
 535           GetSiteInstance();
 536   // If this came from a swapped out RenderFrameHost, we only allow the request
 537   // if we are still in the same BrowsingInstance.
 538   // TODO(creis): Move this to RenderFrameProxyHost::OpenURL.
 539   if (render_frame_host->is_swapped_out() &&
 540       !render_frame_host->GetSiteInstance()->IsRelatedSiteInstance(
 541           current_site_instance)) {
 542     return;
 543   }
 544
 545   // Delegate to RequestTransferURL because this is just the generic
 546   // case where |old_request_id| is empty.
 547   // TODO(creis): Pass the redirect_chain into this method to support client
 548   // redirects.  http://crbug.com/311721.
 549   std::vector<GURL> redirect_chain;
 550   RequestTransferURL(render_frame_host, url, source_site_instance,
 551                      redirect_chain, referrer, ui::PAGE_TRANSITION_LINK,
 552                      disposition, GlobalRequestID(),
 553                      should_replace_current_entry, user_gesture);
 554 }
 555
 556 void NavigatorImpl::RequestTransferURL(
 557     RenderFrameHostImpl* render_frame_host,
 558     const GURL& url,
 559     SiteInstance* source_site_instance,
 560     const std::vector<GURL>& redirect_chain,
 561     const Referrer& referrer,
 562     ui::PageTransition page_transition,
 563     WindowOpenDisposition disposition,
 564     const GlobalRequestID& transferred_global_request_id,
 565     bool should_replace_current_entry,
 566     bool user_gesture) {
 567   GURL dest_url(url);
 568   SiteInstance* current_site_instance =
 569       GetRenderManager(render_frame_host)->current_frame_host()->
 570           GetSiteInstance();
 571   if (!GetContentClient()->browser()->ShouldAllowOpenURL(
 572           current_site_instance, url)) {
 573     dest_url = GURL(url::kAboutBlankURL);
 574   }
 575
 576   int frame_tree_node_id = -1;
 577
 578   // Send the navigation to the current FrameTreeNode if it's destined for a
 579   // subframe in the current tab.  We'll assume it's for the main frame
 580   // (possibly of a new or different WebContents) otherwise.
 581   if (SiteIsolationPolicy::AreCrossProcessFramesPossible() &&
 582       disposition == CURRENT_TAB && render_frame_host->GetParent()) {
 583     frame_tree_node_id =
 584         render_frame_host->frame_tree_node()->frame_tree_node_id();
 585   }
 586
 587   OpenURLParams params(
 588       dest_url, referrer, frame_tree_node_id, disposition, page_transition,
 589       true /* is_renderer_initiated */);
 590   params.source_site_instance = source_site_instance;
 591   if (redirect_chain.size() > 0)
 592     params.redirect_chain = redirect_chain;
 593   params.transferred_global_request_id = transferred_global_request_id;
 594   params.should_replace_current_entry = should_replace_current_entry;
 595   params.user_gesture = user_gesture;
 596
 597   if (GetRenderManager(render_frame_host)->web_ui()) {
 598     // Web UI pages sometimes want to override the page transition type for
 599     // link clicks (e.g., so the new tab page can specify AUTO_BOOKMARK for
 600     // automatically generated suggestions).  We don't override other types
 601     // like TYPED because they have different implications (e.g., autocomplete).
 602     if (ui::PageTransitionCoreTypeIs(
 603         params.transition, ui::PAGE_TRANSITION_LINK))
 604       params.transition =
 605           GetRenderManager(render_frame_host)->web_ui()->
 606               GetLinkTransitionType();
 607
 608     // Note also that we hide the referrer for Web UI pages. We don't really
 609     // want web sites to see a referrer of "chrome://blah" (and some
 610     // chrome: URLs might have search terms or other stuff we don't want to
 611     // send to the site), so we send no referrer.
 612     params.referrer = Referrer();
 613
 614     // Navigations in Web UI pages count as browser-initiated navigations.
 615     params.is_renderer_initiated = false;
 616   }
 617
 618   if (delegate_)
 619     delegate_->RequestOpenURL(render_frame_host, params);
 620 }
 621
 622 // PlzNavigate
 623 void NavigatorImpl::OnBeforeUnloadACK(FrameTreeNode* frame_tree_node,
 624                                       bool proceed) {
 625   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 626       switches::kEnableBrowserSideNavigation));
 627   DCHECK(frame_tree_node);
 628
 629   NavigationRequest* navigation_request = frame_tree_node->navigation_request();
 630
 631   // The NavigationRequest may have been canceled while the renderer was
 632   // executing the BeforeUnload event.
 633   if (!navigation_request)
 634     return;
 635
 636   DCHECK_EQ(NavigationRequest::WAITING_FOR_RENDERER_RESPONSE,
 637             navigation_request->state());
 638
 639   // If the navigation is allowed to proceed, send the request to the IO thread.
 640   if (proceed)
 641     navigation_request->BeginNavigation();
 642   else
 643     CancelNavigation(frame_tree_node);
 644 }
 645
 646 // PlzNavigate
 647 void NavigatorImpl::OnBeginNavigation(
 648     FrameTreeNode* frame_tree_node,
 649     const CommonNavigationParams& common_params,
 650     const BeginNavigationParams& begin_params,
 651     scoped_refptr<ResourceRequestBody> body) {
 652   // TODO(clamy): the url sent by the renderer should be validated with
 653   // FilterURL.
 654   // This is a renderer-initiated navigation.
 655   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 656       switches::kEnableBrowserSideNavigation));
 657   DCHECK(frame_tree_node);
 658
 659   NavigationRequest* ongoing_navigation_request =
 660       frame_tree_node->navigation_request();
 661
 662   // The renderer-initiated navigation request is ignored iff a) there is an
 663   // ongoing request b) which is browser or user-initiated and c) the renderer
 664   // request is not user-initiated.
 665   if (ongoing_navigation_request &&
 666       (ongoing_navigation_request->browser_initiated() ||
 667        ongoing_navigation_request->begin_params().has_user_gesture) &&
 668       !begin_params.has_user_gesture) {
 669     return;
 670   }
 671
 672   // In all other cases the current navigation, if any, is canceled and a new
 673   // NavigationRequest is created for the node.
 674   frame_tree_node->CreatedNavigationRequest(
 675       NavigationRequest::CreateRendererInitiated(
 676           frame_tree_node, common_params, begin_params, body,
 677           controller_->GetLastCommittedEntryIndex(),
 678           controller_->GetEntryCount()));
 679   NavigationRequest* navigation_request = frame_tree_node->navigation_request();
 680   navigation_request->CreateNavigationHandle(delegate_);
 681
 682   if (frame_tree_node->IsMainFrame()) {
 683     // Renderer-initiated main-frame navigations that need to swap processes
 684     // will go to the browser via a OpenURL call, and then be handled by the
 685     // same code path as browser-initiated navigations. For renderer-initiated
 686     // main frame navigation that start via a BeginNavigation IPC, the
 687     // RenderFrameHost will not be swapped. Therefore it is safe to call
 688     // DidStartMainFrameNavigation with the SiteInstance from the current
 689     // RenderFrameHost.
 690     DidStartMainFrameNavigation(
 691         common_params.url,
 692         frame_tree_node->current_frame_host()->GetSiteInstance());
 693     navigation_data_.reset();
 694   }
 695
 696   navigation_request->BeginNavigation();
 697 }
 698
 699 // PlzNavigate
 700 void NavigatorImpl::CommitNavigation(FrameTreeNode* frame_tree_node,
 701                                      ResourceResponse* response,
 702                                      scoped_ptr<StreamHandle> body) {
 703   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 704       switches::kEnableBrowserSideNavigation));
 705
 706   NavigationRequest* navigation_request = frame_tree_node->navigation_request();
 707   DCHECK(navigation_request);
 708   DCHECK(response ||
 709          !ShouldMakeNetworkRequestForURL(
 710              navigation_request->common_params().url));
 711
 712   // HTTP 204 (No Content) and HTTP 205 (Reset Content) responses should not
 713   // commit; they leave the frame showing the previous page.
 714   if (response && response->head.headers.get() &&
 715       (response->head.headers->response_code() == 204 ||
 716        response->head.headers->response_code() == 205)) {
 717     CancelNavigation(frame_tree_node);
 718     return;
 719   }
 720
 721   // Select an appropriate renderer to commit the navigation.
 722   RenderFrameHostImpl* render_frame_host =
 723       frame_tree_node->render_manager()->GetFrameHostForNavigation(
 724           *navigation_request);
 725
 726   // The renderer can exit view source mode when any error or cancellation
 727   // happen. When reusing the same renderer, overwrite to recover the mode.
 728   if (navigation_request->is_view_source() &&
 729       render_frame_host ==
 730           frame_tree_node->render_manager()->current_frame_host()) {
 731     DCHECK(!render_frame_host->GetParent());
 732     render_frame_host->render_view_host()->Send(
 733         new ViewMsg_EnableViewSourceMode(
 734             render_frame_host->render_view_host()->GetRoutingID()));
 735   }
 736
 737   CheckWebUIRendererDoesNotDisplayNormalURL(
 738       render_frame_host, navigation_request->common_params().url);
 739
 740   navigation_request->TransferNavigationHandleOwnership(render_frame_host);
 741   render_frame_host->CommitNavigation(response, body.Pass(),
 742                                       navigation_request->common_params(),
 743                                       navigation_request->request_params());
 744
 745 }
 746
 747 // PlzNavigate
 748 void NavigatorImpl::FailedNavigation(FrameTreeNode* frame_tree_node,
 749                                      bool has_stale_copy_in_cache,
 750                                      int error_code) {
 751   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 752       switches::kEnableBrowserSideNavigation));
 753
 754   NavigationRequest* navigation_request = frame_tree_node->navigation_request();
 755   DCHECK(navigation_request);
 756
 757   // If the request was canceled by the user do not show an error page.
 758   if (error_code == net::ERR_ABORTED) {
 759     frame_tree_node->ResetNavigationRequest(false);
 760     return;
 761   }
 762
 763   // Select an appropriate renderer to show the error page.
 764   RenderFrameHostImpl* render_frame_host =
 765       frame_tree_node->render_manager()->GetFrameHostForNavigation(
 766           *navigation_request);
 767   CheckWebUIRendererDoesNotDisplayNormalURL(
 768       render_frame_host, navigation_request->common_params().url);
 769
 770   navigation_request->TransferNavigationHandleOwnership(render_frame_host);
 771   render_frame_host->FailedNavigation(navigation_request->common_params(),
 772                                       navigation_request->request_params(),
 773                                       has_stale_copy_in_cache, error_code);
 774 }
 775
 776 // PlzNavigate
 777 void NavigatorImpl::CancelNavigation(FrameTreeNode* frame_tree_node) {
 778   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 779       switches::kEnableBrowserSideNavigation));
 780   frame_tree_node->ResetNavigationRequest(false);
 781   if (frame_tree_node->IsMainFrame())
 782     navigation_data_.reset();
 783 }
 784
 785 void NavigatorImpl::LogResourceRequestTime(
 786     base::TimeTicks timestamp, const GURL& url) {
 787   if (navigation_data_ && navigation_data_->url_ == url) {
 788     navigation_data_->url_job_start_time_ = timestamp;
 789     UMA_HISTOGRAM_TIMES(
 790         "Navigation.TimeToURLJobStart",
 791         navigation_data_->url_job_start_time_ - navigation_data_->start_time_);
 792   }
 793 }
 794
 795 void NavigatorImpl::LogBeforeUnloadTime(
 796     const base::TimeTicks& renderer_before_unload_start_time,
 797     const base::TimeTicks& renderer_before_unload_end_time) {
 798   // Only stores the beforeunload delay if we're tracking a browser initiated
 799   // navigation and it happened later than the navigation request.
 800   if (navigation_data_ &&
 801       renderer_before_unload_start_time > navigation_data_->start_time_) {
 802     navigation_data_->before_unload_delay_ =
 803         renderer_before_unload_end_time - renderer_before_unload_start_time;
 804   }
 805 }
 806
 807 void NavigatorImpl::CheckWebUIRendererDoesNotDisplayNormalURL(
 808     RenderFrameHostImpl* render_frame_host,
 809     const GURL& url) {
 810   int enabled_bindings =
 811       render_frame_host->render_view_host()->GetEnabledBindings();
 812   bool is_allowed_in_web_ui_renderer =
 813       WebUIControllerFactoryRegistry::GetInstance()->IsURLAcceptableForWebUI(
 814           controller_->GetBrowserContext(), url);
 815   if ((enabled_bindings & BINDINGS_POLICY_WEB_UI) &&
 816       !is_allowed_in_web_ui_renderer) {
 817     // Log the URL to help us diagnose any future failures of this CHECK.
 818     GetContentClient()->SetActiveURL(url);
 819     CHECK(0);
 820   }
 821 }
 822
 823 // PlzNavigate
 824 void NavigatorImpl::RequestNavigation(
 825     FrameTreeNode* frame_tree_node,
 826     const GURL& dest_url,
 827     const Referrer& dest_referrer,
 828     const FrameNavigationEntry& frame_entry,
 829     const NavigationEntryImpl& entry,
 830     NavigationController::ReloadType reload_type,
 831     bool is_same_document_history_load,
 832     base::TimeTicks navigation_start) {
 833   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
 834       switches::kEnableBrowserSideNavigation));
 835   DCHECK(frame_tree_node);
 836
 837   // This value must be set here because creating a NavigationRequest might
 838   // change the renderer live/non-live status and change this result.
 839   bool should_dispatch_beforeunload =
 840       frame_tree_node->current_frame_host()->ShouldDispatchBeforeUnload();
 841   FrameMsg_Navigate_Type::Value navigation_type =
 842       GetNavigationType(controller_->GetBrowserContext(), entry, reload_type);
 843   frame_tree_node->CreatedNavigationRequest(
 844       NavigationRequest::CreateBrowserInitiated(
 845           frame_tree_node, dest_url, dest_referrer, frame_entry, entry,
 846           navigation_type, is_same_document_history_load, navigation_start,
 847           controller_));
 848   NavigationRequest* navigation_request = frame_tree_node->navigation_request();
 849   navigation_request->CreateNavigationHandle(delegate_);
 850
 851   // Have the current renderer execute its beforeunload event if needed. If it
 852   // is not needed (when beforeunload dispatch is not needed or this navigation
 853   // is synchronous and same-site) then NavigationRequest::BeginNavigation
 854   // should be directly called instead.
 855   if (should_dispatch_beforeunload &&
 856       ShouldMakeNetworkRequestForURL(
 857           navigation_request->common_params().url)) {
 858     navigation_request->SetWaitingForRendererResponse();
 859     frame_tree_node->current_frame_host()->DispatchBeforeUnload(true);
 860   } else {
 861     navigation_request->BeginNavigation();
 862   }
 863 }
 864
 865 void NavigatorImpl::RecordNavigationMetrics(
 866     const LoadCommittedDetails& details,
 867     const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
 868     SiteInstance* site_instance) {
 869   DCHECK(site_instance->HasProcess());
 870
 871   if (!details.is_in_page)
 872     RecordAction(base::UserMetricsAction("FrameLoad"));
 873
 874   if (!details.is_main_frame || !navigation_data_ ||
 875       navigation_data_->url_job_start_time_.is_null() ||
 876       navigation_data_->url_ != params.original_request_url) {
 877     return;
 878   }
 879
 880   base::TimeDelta time_to_commit =
 881       base::TimeTicks::Now() - navigation_data_->start_time_;
 882   UMA_HISTOGRAM_TIMES("Navigation.TimeToCommit", time_to_commit);
 883
 884   time_to_commit -= navigation_data_->before_unload_delay_;
 885   base::TimeDelta time_to_network = navigation_data_->url_job_start_time_ -
 886                                     navigation_data_->start_time_ -
 887                                     navigation_data_->before_unload_delay_;
 888   if (navigation_data_->is_restoring_from_last_session_) {
 889     UMA_HISTOGRAM_TIMES(
 890         "Navigation.TimeToCommit_SessionRestored_BeforeUnloadDiscounted",
 891         time_to_commit);
 892     UMA_HISTOGRAM_TIMES(
 893         "Navigation.TimeToURLJobStart_SessionRestored_BeforeUnloadDiscounted",
 894         time_to_network);
 895     navigation_data_.reset();
 896     return;
 897   }
 898   bool navigation_created_new_renderer_process =
 899       site_instance->GetProcess()->GetInitTimeForNavigationMetrics() >
 900       navigation_data_->start_time_;
 901   if (navigation_created_new_renderer_process) {
 902     UMA_HISTOGRAM_TIMES(
 903         "Navigation.TimeToCommit_NewRenderer_BeforeUnloadDiscounted",
 904         time_to_commit);
 905     UMA_HISTOGRAM_TIMES(
 906         "Navigation.TimeToURLJobStart_NewRenderer_BeforeUnloadDiscounted",
 907         time_to_network);
 908   } else {
 909     UMA_HISTOGRAM_TIMES(
 910         "Navigation.TimeToCommit_ExistingRenderer_BeforeUnloadDiscounted",
 911         time_to_commit);
 912     UMA_HISTOGRAM_TIMES(
 913         "Navigation.TimeToURLJobStart_ExistingRenderer_BeforeUnloadDiscounted",
 914         time_to_network);
 915   }
 916   navigation_data_.reset();
 917 }
 918
 919 void NavigatorImpl::DidStartMainFrameNavigation(
 920     const GURL& url,
 921     SiteInstanceImpl* site_instance) {
 922   // If there is no browser-initiated pending entry for this navigation and it
 923   // is not for the error URL, create a pending entry using the current
 924   // SiteInstance, and ensure the address bar updates accordingly.  We don't
 925   // know the referrer or extra headers at this point, but the referrer will
 926   // be set properly upon commit.
 927   NavigationEntryImpl* pending_entry = controller_->GetPendingEntry();
 928   bool has_browser_initiated_pending_entry =
 929       pending_entry && !pending_entry->is_renderer_initiated();
 930   if (!has_browser_initiated_pending_entry) {
 931     scoped_ptr<NavigationEntryImpl> entry =
 932         NavigationEntryImpl::FromNavigationEntry(
 933             controller_->CreateNavigationEntry(
 934                 url, content::Referrer(), ui::PAGE_TRANSITION_LINK,
 935                 true /* is_renderer_initiated */, std::string(),
 936                 controller_->GetBrowserContext()));
 937     entry->set_site_instance(site_instance);
 938     // TODO(creis): If there's a pending entry already, find a safe way to
 939     // update it instead of replacing it and copying over things like this.
 940     if (pending_entry) {
 941       entry->set_transferred_global_request_id(
 942           pending_entry->transferred_global_request_id());
 943       entry->set_should_replace_entry(pending_entry->should_replace_entry());
 944       entry->SetRedirectChain(pending_entry->GetRedirectChain());
 945     }
 946     controller_->SetPendingEntry(entry.Pass());
 947     if (delegate_)
 948       delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
 949   }
 950 }
 951
 952 }  // namespace content