Adds keyboard functionality for videos.

third_party/WebKit/Source/core/html/shadow/MediaControlElements.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 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.
@@ skipping 239 matching lines @@
  public:
   static MediaControlTimelineElement* create(MediaControls&);
 
   bool willRespondToMouseClickEvents() override;
 
   // FIXME: An "earliest possible position" will be needed once that concept
   // is supported by HTMLMediaElement, see https://crbug.com/137275
   void setPosition(double);
   void setDuration(double);
 
+  void defaultEventHandler(Event*) override;
+
  private:
   explicit MediaControlTimelineElement(MediaControls&);
 
-  void defaultEventHandler(Event*) override;
   bool keepEventInNode(Event*) override;
 };
 
 // ----------------------------
 
 class MediaControlFullscreenButtonElement final
     : public MediaControlInputElement {
  public:
   static MediaControlFullscreenButtonElement* create(MediaControls&);
 
@@ skipping 58 matching lines @@
 // ----------------------------
 
 class MediaControlVolumeSliderElement final : public MediaControlInputElement {
  public:
   static MediaControlVolumeSliderElement* create(MediaControls&);
 
   bool willRespondToMouseMoveEvents() override;
   bool willRespondToMouseClickEvents() override;
   void setVolume(double);
 
+  void defaultEventHandler(Event*) override;
+
  private:
   explicit MediaControlVolumeSliderElement(MediaControls&);
 
-  void defaultEventHandler(Event*) override;
   bool keepEventInNode(Event*) override;
 };
 
 // ----------------------------
 
 class MediaControlTimeRemainingDisplayElement final
     : public MediaControlTimeDisplayElement {
  public:
   static MediaControlTimeRemainingDisplayElement* create(MediaControls&);
 
  private:
   explicit MediaControlTimeRemainingDisplayElement(MediaControls&);
 };
 
 // ----------------------------
 
 class MediaControlCurrentTimeDisplayElement final
     : public MediaControlTimeDisplayElement {
  public:
   static MediaControlCurrentTimeDisplayElement* create(MediaControls&);
 
  private:
   explicit MediaControlCurrentTimeDisplayElement(MediaControls&);
 };
 
 }  // namespace blink
 
 #endif  // MediaControlElements_h