Defer media playback in background tabs.

content/public/renderer/content_renderer_client.h

 // Copyright (c) 2012 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_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 135 matching lines @@
       blink::WebFrame* frame,
       const blink::WebURLRequest& failed_request,
       const blink::WebURLError& error,
       std::string* error_html,
       base::string16* error_description) {}
 
   // Allows the embedder to control when media resources are loaded. Embedders
   // can run |closure| immediately if they don't wish to defer media resource
   // loading.
   virtual void DeferMediaLoad(RenderFrame* render_frame,
+                              bool render_frame_has_played_media_before,

[Charlie Reis, 2015/08/18 17:30:03]

Maybe |has_played_media_before|?  The render frame part seems implicit from the
first parameter, and you can tie it together with a comment above.

[DaleCurtis, 2015/08/18 18:19:12]

Done.

                               const base::Closure& closure);
 
   // Allows the embedder to override creating a WebMediaStreamCenter. If it
   // returns NULL the content layer will create the stream center.
   virtual blink::WebMediaStreamCenter* OverrideCreateWebMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client);
 
   // Allows the embedder to override creating a WebRTCPeerConnectionHandler. If
   // it returns NULL the content layer will create the connection handler.
   virtual blink::WebRTCPeerConnectionHandler*
@@ skipping 129 matching lines @@
   // Gives the embedder a chance to add properties to the context menu.
   // Currently only called when the context menu is for an image.
   virtual void AddImageContextMenuProperties(
       const blink::WebURLResponse& response,
       std::map<std::string, std::string>* properties) {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_