Start moving core pieces of Chrome multi-process code to src\content.

chrome/browser/tab_contents/render_view_host_manager.cc

Index: chrome/browser/tab_contents/render_view_host_manager.cc
===================================================================
--- chrome/browser/tab_contents/render_view_host_manager.cc	(revision 75329)
+++ chrome/browser/tab_contents/render_view_host_manager.cc	(working copy)
@@ -1,729 +0,0 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/tab_contents/render_view_host_manager.h"
-
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "chrome/browser/dom_ui/web_ui.h"
-#include "chrome/browser/dom_ui/web_ui_factory.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/renderer_host/render_view_host.h"
-#include "chrome/browser/renderer_host/render_view_host_delegate.h"
-#include "chrome/browser/renderer_host/render_view_host_factory.h"
-#include "chrome/browser/renderer_host/render_widget_host_view.h"
-#include "chrome/browser/renderer_host/site_instance.h"
-#include "chrome/browser/tab_contents/navigation_controller.h"
-#include "chrome/browser/tab_contents/navigation_entry.h"
-#include "chrome/browser/tab_contents/tab_contents_view.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/notification_service.h"
-#include "chrome/common/notification_type.h"
-#include "chrome/common/render_messages.h"
-#include "chrome/common/render_messages_params.h"
-#include "chrome/common/url_constants.h"
-
-namespace base {
-class WaitableEvent;
-}
-
-RenderViewHostManager::RenderViewHostManager(
-    RenderViewHostDelegate* render_view_delegate,
-    Delegate* delegate)
-    : delegate_(delegate),
-      cross_navigation_pending_(false),
-      render_view_delegate_(render_view_delegate),
-      render_view_host_(NULL),
-      pending_render_view_host_(NULL),
-      interstitial_page_(NULL) {
-}
-
-RenderViewHostManager::~RenderViewHostManager() {
-  if (pending_render_view_host_)
-    CancelPending();
-
-  // We should always have a main RenderViewHost.
-  RenderViewHost* render_view_host = render_view_host_;
-  render_view_host_ = NULL;
-  render_view_host->Shutdown();
-}
-
-void RenderViewHostManager::Init(Profile* profile,
-                                 SiteInstance* site_instance,
-                                 int routing_id) {
-  // Create a RenderViewHost, once we have an instance.  It is important to
-  // immediately give this SiteInstance to a RenderViewHost so that it is
-  // ref counted.
-  if (!site_instance)
-    site_instance = SiteInstance::CreateSiteInstance(profile);
-  render_view_host_ = RenderViewHostFactory::Create(
-      site_instance, render_view_delegate_, routing_id, delegate_->
-      GetControllerForRenderManager().session_storage_namespace());
-  NotificationService::current()->Notify(
-      NotificationType::RENDER_VIEW_HOST_CREATED_FOR_TAB,
-      Source<RenderViewHostManager>(this),
-      Details<RenderViewHost>(render_view_host_));
-}
-
-RenderWidgetHostView* RenderViewHostManager::GetRenderWidgetHostView() const {
-  if (!render_view_host_)
-    return NULL;
-  return render_view_host_->view();
-}
-
-RenderViewHost* RenderViewHostManager::Navigate(const NavigationEntry& entry) {
-  // Create a pending RenderViewHost. It will give us the one we should use
-  RenderViewHost* dest_render_view_host = UpdateRendererStateForNavigate(entry);
-  if (!dest_render_view_host)
-    return NULL;  // We weren't able to create a pending render view host.
-
-  // If the current render_view_host_ isn't live, we should create it so
-  // that we don't show a sad tab while the dest_render_view_host fetches
-  // its first page.  (Bug 1145340)
-  if (dest_render_view_host != render_view_host_ &&
-      !render_view_host_->IsRenderViewLive()) {
-    // Note: we don't call InitRenderView here because we are navigating away
-    // soon anyway, and we don't have the NavigationEntry for this host.
-    delegate_->CreateRenderViewForRenderManager(render_view_host_);
-  }
-
-  // If the renderer crashed, then try to create a new one to satisfy this
-  // navigation request.
-  if (!dest_render_view_host->IsRenderViewLive()) {
-    if (!InitRenderView(dest_render_view_host, entry))
-      return NULL;
-
-    // Now that we've created a new renderer, be sure to hide it if it isn't
-    // our primary one.  Otherwise, we might crash if we try to call Show()
-    // on it later.
-    if (dest_render_view_host != render_view_host_ &&
-        dest_render_view_host->view()) {
-      dest_render_view_host->view()->Hide();
-    } else {
-      // This is our primary renderer, notify here as we won't be calling
-      // CommitPending (which does the notify).
-      RenderViewHostSwitchedDetails details;
-      details.new_host = render_view_host_;
-      details.old_host = NULL;
-      NotificationService::current()->Notify(
-          NotificationType::RENDER_VIEW_HOST_CHANGED,
-          Source<NavigationController>(
-              &delegate_->GetControllerForRenderManager()),
-          Details<RenderViewHostSwitchedDetails>(&details));
-    }
-  }
-
-  return dest_render_view_host;
-}
-
-void RenderViewHostManager::Stop() {
-  render_view_host_->Stop();
-
-  // If we are cross-navigating, we should stop the pending renderers.  This
-  // will lead to a DidFailProvisionalLoad, which will properly destroy them.
-  if (cross_navigation_pending_)
-    pending_render_view_host_->Stop();
-}
-
-void RenderViewHostManager::SetIsLoading(bool is_loading) {
-  render_view_host_->SetIsLoading(is_loading);
-  if (pending_render_view_host_)
-    pending_render_view_host_->SetIsLoading(is_loading);
-}
-
-bool RenderViewHostManager::ShouldCloseTabOnUnresponsiveRenderer() {
-  if (!cross_navigation_pending_)
-    return true;
-
-  // If the tab becomes unresponsive during unload while doing a
-  // cross-site navigation, proceed with the navigation.  (This assumes that
-  // the pending RenderViewHost is still responsive.)
-  int pending_request_id = pending_render_view_host_->GetPendingRequestId();
-  if (pending_request_id == -1) {
-    // Haven't gotten around to starting the request, because we're still
-    // waiting for the beforeunload handler to finish.  We'll pretend that it
-    // did finish, to let the navigation proceed.  Note that there's a danger
-    // that the beforeunload handler will later finish and possibly return
-    // false (meaning the navigation should not proceed), but we'll ignore it
-    // in this case because it took too long.
-    if (pending_render_view_host_->are_navigations_suspended())
-      pending_render_view_host_->SetNavigationsSuspended(false);
-  } else {
-    // The request has been started and paused, while we're waiting for the
-    // unload handler to finish.  We'll pretend that it did, by notifying the
-    // IO thread to let the response continue.  The pending renderer will then
-    // be swapped in as part of the usual DidNavigate logic.  (If the unload
-    // handler later finishes, this call will be ignored because the state in
-    // CrossSiteResourceHandler will already be cleaned up.)
-    ViewMsg_ClosePage_Params params;
-    params.closing_process_id =
-        render_view_host_->process()->id();
-    params.closing_route_id = render_view_host_->routing_id();
-    params.for_cross_site_transition = true;
-    params.new_render_process_host_id =
-        pending_render_view_host_->process()->id();
-    params.new_request_id = pending_request_id;
-    current_host()->process()->CrossSiteClosePageACK(params);
-  }
-  return false;
-}
-
-void RenderViewHostManager::DidNavigateMainFrame(
-    RenderViewHost* render_view_host) {
-  if (!cross_navigation_pending_) {
-    DCHECK(!pending_render_view_host_);
-
-    // We should only hear this from our current renderer.
-    DCHECK(render_view_host == render_view_host_);
-
-    // Even when there is no pending RVH, there may be a pending Web UI.
-    if (pending_web_ui_.get())
-      CommitPending();
-    return;
-  }
-
-  if (render_view_host == pending_render_view_host_) {
-    // The pending cross-site navigation completed, so show the renderer.
-    CommitPending();
-    cross_navigation_pending_ = false;
-  } else if (render_view_host == render_view_host_) {
-    // A navigation in the original page has taken place.  Cancel the pending
-    // one.
-    CancelPending();
-    cross_navigation_pending_ = false;
-  } else {
-    // No one else should be sending us DidNavigate in this state.
-    DCHECK(false);
-  }
-}
-
-void RenderViewHostManager::SetWebUIPostCommit(WebUI* web_ui) {
-  DCHECK(!web_ui_.get());
-  web_ui_.reset(web_ui);
-}
-
-void RenderViewHostManager::RendererAbortedProvisionalLoad(
-    RenderViewHost* render_view_host) {
-  // We used to cancel the pending renderer here for cross-site downloads.
-  // However, it's not safe to do that because the download logic repeatedly
-  // looks for this TabContents based on a render view ID.  Instead, we just
-  // leave the pending renderer around until the next navigation event
-  // (Navigate, DidNavigate, etc), which will clean it up properly.
-  // TODO(creis): All of this will go away when we move the cross-site logic
-  // to ResourceDispatcherHost, so that we intercept responses rather than
-  // navigation events.  (That's necessary to support onunload anyway.)  Once
-  // we've made that change, we won't create a pending renderer until we know
-  // the response is not a download.
-}
-
-void RenderViewHostManager::ShouldClosePage(bool for_cross_site_transition,
-                                            bool proceed) {
-  if (for_cross_site_transition) {
-    // Ignore if we're not in a cross-site navigation.
-    if (!cross_navigation_pending_)
-      return;
-
-    if (proceed) {
-      // Ok to unload the current page, so proceed with the cross-site
-      // navigation.  Note that if navigations are not currently suspended, it
-      // might be because the renderer was deemed unresponsive and this call was
-      // already made by ShouldCloseTabOnUnresponsiveRenderer.  In that case, it
-      // is ok to do nothing here.
-      if (pending_render_view_host_ &&
-          pending_render_view_host_->are_navigations_suspended())
-        pending_render_view_host_->SetNavigationsSuspended(false);
-    } else {
-      // Current page says to cancel.
-      CancelPending();
-      cross_navigation_pending_ = false;
-    }
-  } else {
-    // Non-cross site transition means closing the entire tab.
-    bool proceed_to_fire_unload;
-    delegate_->BeforeUnloadFiredFromRenderManager(proceed,
-                                                  &proceed_to_fire_unload);
-
-    if (proceed_to_fire_unload) {
-      // This is not a cross-site navigation, the tab is being closed.
-      render_view_host_->ClosePage(false, -1, -1);
-    }
-  }
-}
-
-void RenderViewHostManager::OnCrossSiteResponse(int new_render_process_host_id,
-                                                int new_request_id) {
-  // Should only see this while we have a pending renderer.
-  if (!cross_navigation_pending_)
-    return;
-  DCHECK(pending_render_view_host_);
-
-  // Tell the old renderer to run its onunload handler.  When it finishes, it
-  // will send a ClosePage_ACK to the ResourceDispatcherHost with the given
-  // IDs (of the pending RVH's request), allowing the pending RVH's response to
-  // resume.
-  render_view_host_->ClosePage(true,
-                               new_render_process_host_id, new_request_id);
-
-  // ResourceDispatcherHost has told us to run the onunload handler, which
-  // means it is not a download or unsafe page, and we are going to perform the
-  // navigation.  Thus, we no longer need to remember that the RenderViewHost
-  // is part of a pending cross-site request.
-  pending_render_view_host_->SetHasPendingCrossSiteRequest(false,
-                                                           new_request_id);
-}
-
-void RenderViewHostManager::OnCrossSiteNavigationCanceled() {
-  DCHECK(cross_navigation_pending_);
-  cross_navigation_pending_ = false;
-  if (pending_render_view_host_)
-    CancelPending();
-}
-
-bool RenderViewHostManager::ShouldTransitionCrossSite() {
-  // True if we are using process-per-site-instance (default) or
-  // process-per-site (kProcessPerSite).
-  return !CommandLine::ForCurrentProcess()->HasSwitch(switches::kProcessPerTab);
-}
-
-bool RenderViewHostManager::ShouldSwapProcessesForNavigation(
-    const NavigationEntry* cur_entry,
-    const NavigationEntry* new_entry) const {
-  DCHECK(new_entry);
-
-  // Check for reasons to swap processes even if we are in a process model that
-  // doesn't usually swap (e.g., process-per-tab).
-
-  // For security, we should transition between processes when one is a Web UI
-  // page and one isn't.  If there's no cur_entry, check the current RVH's
-  // site, which might already be committed to a Web UI URL (such as the NTP).
-  const GURL& current_url = (cur_entry) ? cur_entry->url() :
-      render_view_host_->site_instance()->site();
-  Profile* profile = delegate_->GetControllerForRenderManager().profile();
-  if (WebUIFactory::UseWebUIForURL(profile, current_url)) {
-    // Force swap if it's not an acceptable URL for Web UI.
-    if (!WebUIFactory::IsURLAcceptableForWebUI(profile, new_entry->url()))
-      return true;
-  } else {
-    // Force swap if it's a Web UI URL.
-    if (WebUIFactory::UseWebUIForURL(profile, new_entry->url()))
-      return true;
-  }
-
-  if (!cur_entry) {
-    // Always choose a new process when navigating to extension URLs. The
-    // process grouping logic will combine all of a given extension's pages
-    // into the same process.
-    if (new_entry->url().SchemeIs(chrome::kExtensionScheme))
-      return true;
-
-    return false;
-  }
-
-  // We can't switch a RenderView between view source and non-view source mode
-  // without screwing up the session history sometimes (when navigating between
-  // "view-source:http://foo.com/" and "http://foo.com/", WebKit doesn't treat
-  // it as a new navigation). So require a view switch.
-  if (cur_entry->IsViewSourceMode() != new_entry->IsViewSourceMode())
-    return true;
-
-  // Also, we must switch if one is an extension and the other is not the exact
-  // same extension.
-  if (cur_entry->url().SchemeIs(chrome::kExtensionScheme) ||
-      new_entry->url().SchemeIs(chrome::kExtensionScheme)) {
-    if (cur_entry->url().GetOrigin() != new_entry->url().GetOrigin())
-      return true;
-  }
-
-  return false;
-}
-
-SiteInstance* RenderViewHostManager::GetSiteInstanceForEntry(
-    const NavigationEntry& entry,
-    SiteInstance* curr_instance) {
-  // NOTE: This is only called when ShouldTransitionCrossSite is true.
-
-  // If the entry has an instance already, we should use it.
-  if (entry.site_instance())
-    return entry.site_instance();
-
-  // (UGLY) HEURISTIC, process-per-site only:
-  //
-  // If this navigation is generated, then it probably corresponds to a search
-  // query.  Given that search results typically lead to users navigating to
-  // other sites, we don't really want to use the search engine hostname to
-  // determine the site instance for this navigation.
-  //
-  // NOTE: This can be removed once we have a way to transition between
-  //       RenderViews in response to a link click.
-  //
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kProcessPerSite) &&
-      entry.transition_type() == PageTransition::GENERATED)
-    return curr_instance;
-
-  const GURL& dest_url = entry.url();
-
-  // If we haven't used our SiteInstance (and thus RVH) yet, then we can use it
-  // for this entry.  We won't commit the SiteInstance to this site until the
-  // navigation commits (in DidNavigate), unless the navigation entry was
-  // restored or it's a Web UI as described below.
-  if (!curr_instance->has_site()) {
-    // If we've already created a SiteInstance for our destination, we don't
-    // want to use this unused SiteInstance; use the existing one.  (We don't
-    // do this check if the curr_instance has a site, because for now, we want
-    // to compare against the current URL and not the SiteInstance's site.  In
-    // this case, there is no current URL, so comparing against the site is ok.
-    // See additional comments below.)
-    if (curr_instance->HasRelatedSiteInstance(dest_url)) {
-      return curr_instance->GetRelatedSiteInstance(dest_url);
-    } else {
-      // Normally the "site" on the SiteInstance is set lazily when the load
-      // actually commits. This is to support better process sharing in case
-      // the site redirects to some other site: we want to use the destination
-      // site in the site instance.
-      //
-      // In the case of session restore, as it loads all the pages immediately
-      // we need to set the site first, otherwise after a restore none of the
-      // pages would share renderers.
-      //
-      // For Web UI (this mostly comes up for the new tab page), the
-      // SiteInstance has special meaning: we never want to reassign the
-      // process. If you navigate to another site before the Web UI commits,
-      // we still want to create a new process rather than re-using the
-      // existing Web UI process.
-      if (entry.restore_type() != NavigationEntry::RESTORE_NONE ||
-          WebUIFactory::HasWebUIScheme(dest_url))
-        curr_instance->SetSite(dest_url);
-      return curr_instance;
-    }
-  }
-
-  // Otherwise, only create a new SiteInstance for cross-site navigation.
-
-  // TODO(creis): Once we intercept links and script-based navigations, we
-  // will be able to enforce that all entries in a SiteInstance actually have
-  // the same site, and it will be safe to compare the URL against the
-  // SiteInstance's site, as follows:
-  // const GURL& current_url = curr_instance->site();
-  // For now, though, we're in a hybrid model where you only switch
-  // SiteInstances if you type in a cross-site URL.  This means we have to
-  // compare the entry's URL to the last committed entry's URL.
-  NavigationController& controller = delegate_->GetControllerForRenderManager();
-  NavigationEntry* curr_entry = controller.GetLastCommittedEntry();
-  if (interstitial_page_) {
-    // The interstitial is currently the last committed entry, but we want to
-    // compare against the last non-interstitial entry.
-    curr_entry = controller.GetEntryAtOffset(-1);
-  }
-  // If there is no last non-interstitial entry (and curr_instance already
-  // has a site), then we must have been opened from another tab.  We want
-  // to compare against the URL of the page that opened us, but we can't
-  // get to it directly.  The best we can do is check against the site of
-  // the SiteInstance.  This will be correct when we intercept links and
-  // script-based navigations, but for now, it could place some pages in a
-  // new process unnecessarily.  We should only hit this case if a page tries
-  // to open a new tab to an interstitial-inducing URL, and then navigates
-  // the page to a different same-site URL.  (This seems very unlikely in
-  // practice.)
-  const GURL& current_url = (curr_entry) ? curr_entry->url() :
-      curr_instance->site();
-  Profile* profile = controller.profile();
-
-  if (SiteInstance::IsSameWebSite(profile, current_url, dest_url)) {
-    return curr_instance;
-  } else if (ShouldSwapProcessesForNavigation(curr_entry, &entry)) {
-    // When we're swapping, we need to force the site instance AND browsing
-    // instance to be different ones. This addresses special cases where we use
-    // a single BrowsingInstance for all pages of a certain type (e.g., New Tab
-    // Pages), keeping them in the same process. When you navigate away from
-    // that page, we want to explicity ignore that BrowsingInstance and group
-    // this page into the appropriate SiteInstance for its URL.
-    return SiteInstance::CreateSiteInstanceForURL(profile, dest_url);
-  } else {
-    // Start the new renderer in a new SiteInstance, but in the current
-    // BrowsingInstance.  It is important to immediately give this new
-    // SiteInstance to a RenderViewHost (if it is different than our current
-    // SiteInstance), so that it is ref counted.  This will happen in
-    // CreatePendingRenderView.
-    return curr_instance->GetRelatedSiteInstance(dest_url);
-  }
-}
-
-bool RenderViewHostManager::CreatePendingRenderView(
-    const NavigationEntry& entry, SiteInstance* instance) {
-  NavigationEntry* curr_entry =
-      delegate_->GetControllerForRenderManager().GetLastCommittedEntry();
-  if (curr_entry) {
-    DCHECK(!curr_entry->content_state().empty());
-    // TODO(creis): Should send a message to the RenderView to let it know
-    // we're about to switch away, so that it sends an UpdateState message.
-  }
-
-  pending_render_view_host_ = RenderViewHostFactory::Create(
-      instance, render_view_delegate_, MSG_ROUTING_NONE, delegate_->
-      GetControllerForRenderManager().session_storage_namespace());
-  NotificationService::current()->Notify(
-      NotificationType::RENDER_VIEW_HOST_CREATED_FOR_TAB,
-      Source<RenderViewHostManager>(this),
-      Details<RenderViewHost>(pending_render_view_host_));
-
-  bool success = InitRenderView(pending_render_view_host_, entry);
-  if (success) {
-    // Don't show the view until we get a DidNavigate from it.
-    pending_render_view_host_->view()->Hide();
-  } else {
-    CancelPending();
-  }
-  return success;
-}
-
-bool RenderViewHostManager::InitRenderView(RenderViewHost* render_view_host,
-                                           const NavigationEntry& entry) {
-  // If the pending navigation is to a WebUI, tell the RenderView about any
-  // bindings it will need enabled.
-  if (pending_web_ui_.get())
-    render_view_host->AllowBindings(pending_web_ui_->bindings());
-
-  // Tell the RenderView whether it will be used for an extension process.
-  Profile* profile = delegate_->GetControllerForRenderManager().profile();
-  bool is_extension_process = profile->GetExtensionService() &&
-      profile->GetExtensionService()->ExtensionBindingsAllowed(entry.url());
-  render_view_host->set_is_extension_process(is_extension_process);
-
-  return delegate_->CreateRenderViewForRenderManager(render_view_host);
-}
-
-void RenderViewHostManager::CommitPending() {
-  // First check whether we're going to want to focus the location bar after
-  // this commit.  We do this now because the navigation hasn't formally
-  // committed yet, so if we've already cleared |pending_web_ui_| the call chain
-  // this triggers won't be able to figure out what's going on.
-  bool will_focus_location_bar = delegate_->FocusLocationBarByDefault();
-
-  // Next commit the Web UI, if any.
-  web_ui_.swap(pending_web_ui_);
-  if (web_ui_.get() && pending_web_ui_.get() && !pending_render_view_host_)
-    web_ui_->DidBecomeActiveForReusedRenderView();
-  pending_web_ui_.reset();
-
-  // It's possible for the pending_render_view_host_ to be NULL when we aren't
-  // crossing process boundaries. If so, we just needed to handle the Web UI
-  // committing above and we're done.
-  if (!pending_render_view_host_) {
-    if (will_focus_location_bar)
-      delegate_->SetFocusToLocationBar(false);
-    return;
-  }
-
-  // Remember if the page was focused so we can focus the new renderer in
-  // that case.
-  bool focus_render_view = !will_focus_location_bar &&
-      render_view_host_->view() && render_view_host_->view()->HasFocus();
-
-  // Hide the current view and prepare to destroy it.
-  // TODO(creis): Get the old RenderViewHost to send us an UpdateState message
-  // before we destroy it.
-  if (render_view_host_->view())
-    render_view_host_->view()->Hide();
-  RenderViewHost* old_render_view_host = render_view_host_;
-
-  // Swap in the pending view and make it active.
-  render_view_host_ = pending_render_view_host_;
-  pending_render_view_host_ = NULL;
-
-  // If the view is gone, then this RenderViewHost died while it was hidden.
-  // We ignored the RenderViewGone call at the time, so we should send it now
-  // to make sure the sad tab shows up, etc.
-  if (render_view_host_->view())
-    render_view_host_->view()->Show();
-  else
-    delegate_->RenderViewGoneFromRenderManager(render_view_host_);
-
-  // Make sure the size is up to date.  (Fix for bug 1079768.)
-  delegate_->UpdateRenderViewSizeForRenderManager();
-
-  if (will_focus_location_bar)
-    delegate_->SetFocusToLocationBar(false);
-  else if (focus_render_view && render_view_host_->view())
-    render_view_host_->view()->Focus();
-
-  RenderViewHostSwitchedDetails details;
-  details.new_host = render_view_host_;
-  details.old_host = old_render_view_host;
-  NotificationService::current()->Notify(
-      NotificationType::RENDER_VIEW_HOST_CHANGED,
-      Source<NavigationController>(&delegate_->GetControllerForRenderManager()),
-      Details<RenderViewHostSwitchedDetails>(&details));
-
-  old_render_view_host->Shutdown();
-
-  // Let the task manager know that we've swapped RenderViewHosts, since it
-  // might need to update its process groupings.
-  delegate_->NotifySwappedFromRenderManager();
-}
-
-RenderViewHost* RenderViewHostManager::UpdateRendererStateForNavigate(
-    const NavigationEntry& entry) {
-  // If we are cross-navigating, then we want to get back to normal and navigate
-  // as usual.
-  if (cross_navigation_pending_) {
-    if (pending_render_view_host_)
-      CancelPending();
-    cross_navigation_pending_ = false;
-  }
-
-  // This will possibly create (set to NULL) a Web UI object for the pending
-  // page. We'll use this later to give the page special access. This must
-  // happen before the new renderer is created below so it will get bindings.
-  // It must also happen after the above conditional call to CancelPending(),
-  // otherwise CancelPending may clear the pending_web_ui_ and the page will
-  // not have it's bindings set appropriately.
-  pending_web_ui_.reset(delegate_->CreateWebUIForRenderManager(entry.url()));
-
-  // render_view_host_ will not be deleted before the end of this method, so we
-  // don't have to worry about this SiteInstance's ref count dropping to zero.
-  SiteInstance* curr_instance = render_view_host_->site_instance();
-
-  // Determine if we need a new SiteInstance for this entry.
-  // Again, new_instance won't be deleted before the end of this method, so it
-  // is safe to use a normal pointer here.
-  SiteInstance* new_instance = curr_instance;
-  bool force_swap = ShouldSwapProcessesForNavigation(
-          delegate_->GetLastCommittedNavigationEntryForRenderManager(),
-          &entry);
-  if (ShouldTransitionCrossSite() || force_swap)
-    new_instance = GetSiteInstanceForEntry(entry, curr_instance);
-
-  if (new_instance != curr_instance || force_swap) {
-    // New SiteInstance.
-    DCHECK(!cross_navigation_pending_);
-
-    // Create a pending RVH and navigate it.
-    bool success = CreatePendingRenderView(entry, new_instance);
-    if (!success)
-      return NULL;
-
-    // Check if our current RVH is live before we set up a transition.
-    if (!render_view_host_->IsRenderViewLive()) {
-      if (!cross_navigation_pending_) {
-        // The current RVH is not live.  There's no reason to sit around with a
-        // sad tab or a newly created RVH while we wait for the pending RVH to
-        // navigate.  Just switch to the pending RVH now and go back to non
-        // cross-navigating (Note that we don't care about on{before}unload
-        // handlers if the current RVH isn't live.)
-        CommitPending();
-        return render_view_host_;
-      } else {
-        NOTREACHED();
-        return render_view_host_;
-      }
-    }
-    // Otherwise, it's safe to treat this as a pending cross-site transition.
-
-    // Make sure the old render view stops, in case a load is in progress.
-    render_view_host_->Stop();
-
-    // Suspend the new render view (i.e., don't let it send the cross-site
-    // Navigate message) until we hear back from the old renderer's
-    // onbeforeunload handler.  If the handler returns false, we'll have to
-    // cancel the request.
-    DCHECK(!pending_render_view_host_->are_navigations_suspended());
-    pending_render_view_host_->SetNavigationsSuspended(true);
-
-    // Tell the CrossSiteRequestManager that this RVH has a pending cross-site
-    // request, so that ResourceDispatcherHost will know to tell us to run the
-    // old page's onunload handler before it sends the response.
-    pending_render_view_host_->SetHasPendingCrossSiteRequest(true, -1);
-
-    // We now have a pending RVH.
-    DCHECK(!cross_navigation_pending_);
-    cross_navigation_pending_ = true;
-
-    // Tell the old render view to run its onbeforeunload handler, since it
-    // doesn't otherwise know that the cross-site request is happening.  This
-    // will trigger a call to ShouldClosePage with the reply.
-    render_view_host_->FirePageBeforeUnload(true);
-
-    return pending_render_view_host_;
-  } else {
-    if (pending_web_ui_.get() && render_view_host_->IsRenderViewLive())
-      pending_web_ui_->RenderViewReused(render_view_host_);
-
-    // The renderer can exit view source mode when any error or cancellation
-    // happen. We must overwrite to recover the mode.
-    if (entry.IsViewSourceMode()) {
-      render_view_host_->Send(
-          new ViewMsg_EnableViewSourceMode(render_view_host_->routing_id()));
-    }
-  }
-
-  // Same SiteInstance can be used.  Navigate render_view_host_ if we are not
-  // cross navigating.
-  DCHECK(!cross_navigation_pending_);
-  return render_view_host_;
-}
-
-void RenderViewHostManager::CancelPending() {
-  RenderViewHost* pending_render_view_host = pending_render_view_host_;
-  pending_render_view_host_ = NULL;
-  pending_render_view_host->Shutdown();
-
-  pending_web_ui_.reset();
-}
-
-void RenderViewHostManager::RenderViewDeleted(RenderViewHost* rvh) {
-  // We are doing this in order to work around and to track a crasher
-  // (http://crbug.com/23411) where it seems that pending_render_view_host_ is
-  // deleted (not sure from where) but not NULLed.
-  if (rvh == pending_render_view_host_) {
-    // If you hit this NOTREACHED, please report it in the following bug
-    // http://crbug.com/23411 Make sure to include what you were doing when it
-    // happened  (navigating to a new page, closing a tab...) and if you can
-    // reproduce.
-    NOTREACHED();
-    pending_render_view_host_ = NULL;
-  }
-}
-
-void RenderViewHostManager::SwapInRenderViewHost(RenderViewHost* rvh) {
-  web_ui_.reset();
-
-  // Hide the current view and prepare to destroy it.
-  if (render_view_host_->view())
-    render_view_host_->view()->Hide();
-  RenderViewHost* old_render_view_host = render_view_host_;
-
-  // Swap in the new view and make it active.
-  render_view_host_ = rvh;
-  render_view_host_->set_delegate(render_view_delegate_);
-  delegate_->CreateViewAndSetSizeForRVH(render_view_host_);
-  render_view_host_->ActivateDeferredPluginHandles();
-  // If the view is gone, then this RenderViewHost died while it was hidden.
-  // We ignored the RenderViewGone call at the time, so we should send it now
-  // to make sure the sad tab shows up, etc.
-  if (render_view_host_->view()) {
-    // TODO(tburkard,cbentzel): Figure out why this hack is needed and/or
-    // if it can be removed.  On Windows, prerendering will not work without
-    // doing a Hide before the Show.
-    render_view_host_->view()->Hide();
-    render_view_host_->view()->Show();
-  }
-
-  delegate_->UpdateRenderViewSizeForRenderManager();
-
-  RenderViewHostSwitchedDetails details;
-  details.new_host = render_view_host_;
-  details.old_host = old_render_view_host;
-  NotificationService::current()->Notify(
-      NotificationType::RENDER_VIEW_HOST_CHANGED,
-      Source<NavigationController>(&delegate_->GetControllerForRenderManager()),
-      Details<RenderViewHostSwitchedDetails>(&details));
-
-  // This will cause the old RenderViewHost to delete itself.
-  old_render_view_host->Shutdown();
-
-  // Let the task manager know that we've swapped RenderViewHosts, since it
-  // might need to update its process groupings.
-  delegate_->NotifySwappedFromRenderManager();
-}