Defer loading of audio/video tags while prerendering.

content/public/renderer/content_renderer_client.h

Index: content/public/renderer/content_renderer_client.h
diff --git a/content/public/renderer/content_renderer_client.h b/content/public/renderer/content_renderer_client.h
index 521f4b930bd58a95291655cde0fa96d73c4b7e15..50c183f387ee98a278c2ef9881dbaf67a60208fc 100644
--- a/content/public/renderer/content_renderer_client.h
+++ b/content/public/renderer/content_renderer_client.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/string16.h"
+#include "base/memory/weak_ptr.h"
 #include "ipc/ipc_message.h"
 #include "content/public/common/content_client.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageVisibilityState.h"
@@ -19,6 +20,7 @@ class SkBitmap;
 
 namespace WebKit {
 class WebFrame;
+class WebMediaPlayerClient;
 class WebPlugin;
 class WebURLRequest;
 struct WebPluginParams;
@@ -31,6 +33,18 @@ class PpapiInterfaceFactoryManager;
 }
 }
 
+namespace media {
+class FilterCollection;
+class MediaLog;
+class MessageLoopFactory;
+}
+
+namespace webkit_glue {
+class MediaStreamClient;
+class WebMediaPlayerDelegate;
+class WebMediaPlayerImpl;
+}
+
 namespace v8 {
 class Context;
 template<class T> class Handle;
@@ -90,6 +104,22 @@ class ContentRendererClient {
       std::string* error_html,
       string16* error_description) = 0;
 
+  // Returns true if the embedder should call OverrideCreateWebMediaPlayer to
+  // create WebMediaPlayers instead of the standard WebMediaPlayerImpl.
+  virtual bool ShouldOverrideCreateWebMediaPlayer(RenderView* view) = 0;
+
+  // Allows embedder to override creating a WebMediaPlayer. Should only be
+  // called if ShouldOverrideCreateWebMediaPlayer return true.
+  virtual void OverrideCreateWebMediaPlayer(
+      RenderView* render_view,
+      WebKit::WebMediaPlayerClient* client,
+      base::WeakPtr<webkit_glue::WebMediaPlayerDelegate> delegate,
+      media::FilterCollection* collection,
+      media::MessageLoopFactory* message_loop_factory,
+      webkit_glue::MediaStreamClient* media_stream_client,
+      media::MediaLog* media_log,
+      webkit_glue::WebMediaPlayerImpl** player) = 0;
+
   // Returns true if the renderer process should schedule the idle handler when
   // all widgets are hidden.
   virtual bool RunIdleHandlerWhenWidgetsHidden() = 0;