Propagate media play/pause to WebContentsObserver for Chromecast metrics

chromecast/browser/cast_content_window.h

 // Copyright 2014 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 CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
@@ skipping 26 matching lines @@
   // Create a window with the given size for |web_contents|.
   void CreateWindowTree(const gfx::Size& initial_size,
                         content::WebContents* web_contents);
 
   scoped_ptr<content::WebContents> CreateWebContents(
       const gfx::Size& initial_size,
       content::BrowserContext* browser_context);
 
   // content::WebContentsObserver implementation:
   void DidFirstVisuallyNonEmptyPaint() override;
+  void MediaPaused() override;
+  void MediaStartedPlaying() override;
 
  private:
 #if defined(USE_AURA)
   scoped_ptr<aura::WindowTreeHost> window_tree_host_;
   scoped_ptr<aura::test::TestFocusClient> focus_client_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(CastContentWindow);
 };
 
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_