Don't resume paused media. Don't resume playing media after timeout.

media/blink/webmediaplayer_impl.h

 // Copyright 2013 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 MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 484 matching lines @@
   // unimportant.
   bool suppress_destruction_errors_;
 
   // State indicating if it's okay to suspend or not. Updated on the first time
   // OnSuspendRequested() is called. If the state is UNKNOWN, the current frame
   // from the compositor will be queried to see if suspend is supported; the
   // state will be set to YES or NO respectively if a frame is available.
   enum class CanSuspendState { UNKNOWN, YES, NO };
   CanSuspendState can_suspend_state_;
 
+  // The time of the last call to OnHidden().
+  base::TimeTicks last_hidden_time_;
+
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_