Propagate media play/pause to WebContentsObserver for Chromecast metrics

chromecast/browser/cast_content_window.cc

 // 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.
 
 #include "chromecast/browser/cast_content_window.h"
 
 #include "base/threading/thread_restrictions.h"
 #include "chromecast/base/metrics/cast_metrics_helper.h"
 #include "content/public/browser/web_contents.h"
 #include "ipc/ipc_message.h"
@@ skipping 101 matching lines @@
   content::WebContents* web_contents = content::WebContents::Create(
       create_params);
   content::WebContentsObserver::Observe(web_contents);
   return make_scoped_ptr(web_contents);
 }
 
 void CastContentWindow::DidFirstVisuallyNonEmptyPaint() {
   metrics::CastMetricsHelper::GetInstance()->LogTimeToFirstPaint();
 }
 
+void CastContentWindow::MediaPaused() {
+  metrics::CastMetricsHelper::GetInstance()->LogMediaPause();
+}
+
+void CastContentWindow::MediaStartedPlaying() {
+  metrics::CastMetricsHelper::GetInstance()->LogMediaPlay();
+}
+
 }  // namespace chromecast