Adds keyboard functionality for videos.

third_party/WebKit/Source/modules/media_controls/MediaControlsImpl.h

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 191 matching lines @@
   void OnPlay();
   void OnPlaying();
   void OnPause();
   void OnTextTracksAddedOrRemoved();
   void OnTextTracksChanged();
   void OnError();
   void OnLoadedMetadata();
   void OnEnteredFullscreen();
   void OnExitedFullscreen();
   void OnPanelKeypress();
+  void OnMediaKeyboardEvent(Event* event) { DefaultEventHandler(event); }
 
   // Media control elements.
   Member<MediaControlOverlayEnclosureElement> overlay_enclosure_;
   Member<MediaControlOverlayPlayButtonElement> overlay_play_button_;
   Member<MediaControlCastButtonElement> overlay_cast_button_;
   Member<MediaControlPanelEnclosureElement> enclosure_;
   Member<MediaControlPanelElement> panel_;
   Member<MediaControlPlayButtonElement> play_button_;
   Member<MediaControlTimelineElement> timeline_;
   Member<MediaControlCurrentTimeDisplayElement> current_time_display_;
@@ skipping 33 matching lines @@
   IntSize size_;
 
   bool keep_showing_until_timer_fires_ : 1;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(MediaControlsImpl, IsMediaControls());
 
 }  // namespace blink
 
 #endif