Defer loading of audio/video tags while prerendering.

content/renderer/render_view_impl.cc

 // 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 "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 1914 matching lines @@
                                     route_id,
                                     routing_id_);
   }
 }
 
 WebMediaPlayer* RenderViewImpl::createMediaPlayer(
     WebFrame* frame, WebMediaPlayerClient* client) {
   FOR_EACH_OBSERVER(
       RenderViewObserver, observers_, WillCreateMediaPlayer(frame, client));
 
-  scoped_ptr<media::MessageLoopFactory> message_loop_factory(
-      new media::MessageLoopFactoryImpl());
-  scoped_ptr<media::FilterCollection> collection(
-      new media::FilterCollection());
+  media::MessageLoopFactory* message_loop_factory =
+      new media::MessageLoopFactoryImpl();
+  media::FilterCollection* collection = new media::FilterCollection();
+  RenderMediaLog* render_media_log = new RenderMediaLog();
 
   // Add in any custom filter factories first.
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   if (!cmd_line->HasSwitch(switches::kDisableAudio)) {
     // Add the chrome specific audio renderer.
     collection->AddAudioRenderer(new AudioRendererImpl());
   }
 
-  scoped_ptr<webkit_media::WebMediaPlayerImpl> result(
-      new webkit_media::WebMediaPlayerImpl(client,
-                                          AsWeakPtr(),
-                                          collection.release(),
-                                          message_loop_factory.release(),
-                                          media_stream_impl_.get(),
-                                          new RenderMediaLog()));
+  webkit_media::WebMediaPlayerImpl* result_ptr;
+  if (!content::GetContentClient()->renderer()->OverrideCreateWebMediaPlayer(
+      this, client, AsWeakPtr(), collection, message_loop_factory,
+      media_stream_impl_.get(), render_media_log, &result_ptr)) {
+    result_ptr = new webkit_media::WebMediaPlayerImpl(
+        client, AsWeakPtr(), collection, message_loop_factory,
+        media_stream_impl_.get(), render_media_log);
+  }
+
+  DCHECK(result_ptr);
+  scoped_ptr<webkit_media::WebMediaPlayerImpl> result;
+  result.reset(result_ptr);
+
   if (!result->Initialize(frame,
                           cmd_line->HasSwitch(switches::kSimpleDataSource))) {
     return NULL;
   }
   return result.release();
 }
 
 WebApplicationCacheHost* RenderViewImpl::createApplicationCacheHost(
     WebFrame* frame, WebApplicationCacheHostClient* client) {
   return new RendererWebApplicationCacheHostImpl(
@@ skipping 2828 matching lines @@
   return !!RenderThreadImpl::current()->compositor_thread();
 }
 
 void RenderViewImpl::OnJavaBridgeInit(
     const IPC::ChannelHandle& channel_handle) {
   DCHECK(!java_bridge_dispatcher_.get());
 #if defined(ENABLE_JAVA_BRIDGE)
   java_bridge_dispatcher_.reset(new JavaBridgeDispatcher(this, channel_handle));
 #endif
 }