Defer loading of audio/video tags while prerendering.

content/shell/shell_content_renderer_client.cc

Index: content/shell/shell_content_renderer_client.cc
diff --git a/content/shell/shell_content_renderer_client.cc b/content/shell/shell_content_renderer_client.cc
index c1ec601bd4a05d22602cb08b997574ddf4019413..1548134ca26230af88ff16b960ae139c47e837d3 100644
--- a/content/shell/shell_content_renderer_client.cc
+++ b/content/shell/shell_content_renderer_client.cc
@@ -48,6 +48,22 @@ void ShellContentRendererClient::GetNavigationErrorStrings(
     string16* error_description) {
 }
 
+bool ShellContentRendererClient::ShouldOverrideCreateWebMediaPlayer(
+    RenderView* view) {
+  return false;
+}
+
+void ShellContentRendererClient::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) {
+}
+
 bool ShellContentRendererClient::RunIdleHandlerWhenWidgetsHidden() {
   return true;
 }