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