Defer media playback in background tabs.

chrome/renderer/chrome_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 CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 88 matching lines @@
   bool HasErrorPage(int http_status_code, std::string* error_domain) override;
   bool ShouldSuppressErrorPage(content::RenderFrame* render_frame,
                                const GURL& url) override;
   void GetNavigationErrorStrings(content::RenderView* render_view,
                                  blink::WebFrame* frame,
                                  const blink::WebURLRequest& failed_request,
                                  const blink::WebURLError& error,
                                  std::string* error_html,
                                  base::string16* error_description) override;
   void DeferMediaLoad(content::RenderFrame* render_frame,
+                      bool has_played_media_before,
                       const base::Closure& closure) override;
   bool RunIdleHandlerWhenWidgetsHidden() override;
   bool AllowPopup() override;
   bool ShouldFork(blink::WebLocalFrame* frame,
                   const GURL& url,
                   const std::string& http_method,
                   bool is_initial_navigation,
                   bool is_server_redirect,
                   bool* send_referrer) override;
   bool WillSendRequest(blink::WebFrame* frame,
@@ skipping 129 matching lines @@
 #if defined(ENABLE_PRINT_PREVIEW)
   scoped_ptr<ChromePDFPrintClient> pdf_print_client_;
 #endif
 #if defined(ENABLE_PLUGINS)
   std::set<std::string> allowed_camera_device_origins_;
   std::set<std::string> allowed_compositor_origins_;
 #endif
 };
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_