Adds kind-of-live thumbnail generation for a potential tab switcher.

chrome/browser/tab_contents/render_view_host_manager.cc

 // Copyright (c) 2006-2008 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/dom_ui.h"
 #include "chrome/browser/dom_ui/dom_ui_factory.h"
@@ skipping 40 matching lines @@
                                  SiteInstance* site_instance,
                                  int routing_id,
                                  base::WaitableEvent* modal_dialog_event) {
   // 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, modal_dialog_event);
+  NotificationService::current()->Notify(
+      NotificationType::RENDER_VIEW_HOST_CREATED_FOR_TAB,
+      Source<RenderViewHostManager>(this),
+      Details<RenderViewHost>(render_view_host_));
 }
 
 RenderViewHost* RenderViewHostManager::Navigate(const NavigationEntry& entry) {
   // This will possibly create (set to NULL) a DOM 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.
   pending_dom_ui_.reset(delegate_->CreateDOMUIForRenderManager(entry.url()));
 
   // Create a pending RenderViewHost. It will give us the one we should use
   RenderViewHost* dest_render_view_host = UpdateRendererStateForNavigate(entry);
@@ skipping 329 matching lines @@
   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, NULL);
+  NotificationService::current()->Notify(
+      NotificationType::RENDER_VIEW_HOST_CREATED_FOR_TAB,
+      Source<RenderViewHostManager>(this),
+      Details<RenderViewHost>(pending_render_view_host_));
 
   bool success = delegate_->CreateRenderViewForRenderManager(
       pending_render_view_host_);
   if (success) {
     // Don't show the view until we get a DidNavigate from it.
     pending_render_view_host_->view()->Hide();
   } else {
     CancelPending();
   }
   return success;
@@ skipping 152 matching lines @@
 
   pending_dom_ui_.reset();
 }
 
 void RenderViewHostManager::CrossSiteNavigationCanceled() {
   DCHECK(cross_navigation_pending_);
   cross_navigation_pending_ = false;
   if (pending_render_view_host_)
     CancelPending();
 }