3D Compositing in <browser>, first draft.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 2961 matching lines @@
 
   // Now that the RenderView has been created, we need to tell it its size.
   if (rwh_view)
     rwh_view->SetSize(view_->GetContainerSize());
 
   // Make sure we use the correct starting page_id in the new RenderView.
   UpdateMaxPageIDIfNecessary(render_view_host);
   int32 max_page_id =
       GetMaxPageIDForSiteInstance(render_view_host->GetSiteInstance());
 
+  content::NotificationService::current()->Notify(
+      content::NOTIFICATION_WILL_CREATE_RENDER_VIEW,
+      content::Source<WebContents>(this),
+      content::Details<RenderViewHost>(render_view_host));
   if (!static_cast<RenderViewHostImpl*>(
           render_view_host)->CreateRenderView(string16(),
                                               opener_route_id,
                                               max_page_id)) {
     return false;
   }
 
 #if defined(OS_LINUX) || defined(OS_OPENBSD)
   // Force a ViewMsg_Resize to be sent, needed to make plugins show up on
   // linux. See crbug.com/83941.
@@ skipping 62 matching lines @@
 
 RenderViewHostImpl* WebContentsImpl::GetRenderViewHostImpl() {
   return static_cast<RenderViewHostImpl*>(GetRenderViewHost());
 }
 
 void WebContentsImpl::GetBrowserPluginEmbedderInfo(
     content::RenderViewHost* render_view_host,
     std::string* embedder_channel_name,
     int* embedder_container_id) {
 }