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 342df00e3ad204e0a26ed3d601b7efda58954027..f632f160c90b9fbe5349b65b6fa063b3bdc98421 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"
@@ -18,6 +19,7 @@ class SkBitmap;
 
 namespace WebKit {
 class WebFrame;
+class WebMediaPlayerClient;
 class WebPlugin;
 class WebURLRequest;
 struct WebPluginParams;
@@ -30,6 +32,18 @@ class PpapiInterfaceFactoryManager;
 }
 }
 
+namespace media {
+class FilterCollection;
+class MediaLog;
+class MessageLoopFactory;
+}
+
+namespace webkit_media {
+class MediaStreamClient;
+class WebMediaPlayerDelegate;
+class WebMediaPlayerImpl;
+}
+
 namespace v8 {
 class Context;
 template<class T> class Handle;
@@ -89,6 +103,22 @@ 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;

[jam, 2011/12/03 00:39:08]

we try to keep the public interface as small as possible. here, it seems that 1
method will do (i.e. OverrideCreateWebMdediaPlayer). it can have a bool to
indicate  to indicate whether it overrode or not, see OverrideCreatePlugin above

[Shishir, 2011/12/05 22:23:06]

Done.

+
+  // 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_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) = 0;
+
   // Returns true if the renderer process should schedule the idle handler when
   // all widgets are hidden.
   virtual bool RunIdleHandlerWhenWidgetsHidden() = 0;