Defer loading of audio/video tags while prerendering.

content/public/renderer/content_renderer_client.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #pragma once
 
 #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"
 
 class GURL;
 class SkBitmap;
 
 namespace WebKit {
 class WebFrame;
+class WebMediaPlayerClient;
 class WebPlugin;
 class WebURLRequest;
 struct WebPluginParams;
 struct WebURLError;
 }
 
 namespace webkit {
 namespace ppapi {
 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;
 }
 
 namespace content {
 
 class RenderView;
 
 // Embedder API for participating in renderer logic.
@@ skipping 39 matching lines @@
   // message describing the error that has occurred.
   // Either of the out parameters may be not written to in certain cases
   // (lack of information on the error code) so the caller should take care to
   // initialize the string values with safe defaults before the call.
   virtual void GetNavigationErrorStrings(
       const WebKit::WebURLRequest& failed_request,
       const WebKit::WebURLError& error,
       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;
 
   // Returns true if the given url can create popup windows.
   virtual bool AllowPopup(const GURL& creator) = 0;
 
   // Returns true if we should fork a new process for the given navigation.
   virtual bool ShouldFork(WebKit::WebFrame* frame,
                           const GURL& url,
@@ skipping 42 matching lines @@
                                       const GURL& first_party_for_cookies,
                                       const std::string& value) = 0;
 
   virtual void RegisterPPAPIInterfaceFactories(
     webkit::ppapi::PpapiInterfaceFactoryManager* factory_manager) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_