Defer loading of audio/video tags while prerendering.

content/renderer/mock_content_renderer_client.h

Index: content/renderer/mock_content_renderer_client.h
diff --git a/content/renderer/mock_content_renderer_client.h b/content/renderer/mock_content_renderer_client.h
index 5784da40fe4b683f4b9e36351ba4cdac45011162..02c34225077699994ef85d10514a65d6b3211bd9 100644
--- a/content/renderer/mock_content_renderer_client.h
+++ b/content/renderer/mock_content_renderer_client.h
@@ -34,6 +34,16 @@ class MockContentRendererClient : public ContentRendererClient {
       const WebKit::WebURLError& error,
       std::string* error_html,
       string16* error_description) OVERRIDE;
+  virtual bool ShouldOverrideCreateWebMediaPlayer(RenderView* view) OVERRIDE;
+  virtual void OverrideCreateWebMediaPlayer(
+      RenderView* render_view,
+      WebKit::WebMediaPlayerClient* client,
+      base::WeakPtr<webkit_media::WebMediaPlayerDelegate> delegate,
+      media::FilterCollection* collection,
+      media::MessageLoopFactory* message_loop_factory,
+      webkit_media::MediaStreamClient* media_stream_client,
+      media::MediaLog* media_log,
+      webkit_media::WebMediaPlayerImpl** player) OVERRIDE;
   virtual bool RunIdleHandlerWhenWidgetsHidden() OVERRIDE;
   virtual bool AllowPopup(const GURL& creator) OVERRIDE;
   virtual bool ShouldFork(WebKit::WebFrame* frame,