Adds keyboard functionality for videos.

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

Index: third_party/WebKit/Source/core/html/shadow/MediaControlElements.h
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControlElements.h b/third_party/WebKit/Source/core/html/shadow/MediaControlElements.h
index df272a9493bee9dd77330ad7c5154beb82b50715..a7068637f744acba8fddd3f2c045c8a505080ed3 100644
--- a/third_party/WebKit/Source/core/html/shadow/MediaControlElements.h
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControlElements.h
@@ -120,10 +120,10 @@ class MediaControlPlayButtonElement final : public MediaControlInputElement {
 
   bool hasOverflowButton() override { return true; }
 
+  void defaultEventHandler(Event*) override;
+
  private:
   explicit MediaControlPlayButtonElement(MediaControls&);
-
-  void defaultEventHandler(Event*) override;
 };
 
 // ----------------------------
@@ -273,10 +273,11 @@ class MediaControlTimelineElement final : public MediaControlInputElement {
   void setPosition(double);
   void setDuration(double);
 
+  void defaultEventHandler(Event*) override;
+
  private:
   explicit MediaControlTimelineElement(MediaControls&);
 
-  void defaultEventHandler(Event*) override;
   bool keepEventInNode(Event*) override;
 };
 
@@ -354,10 +355,11 @@ class MediaControlVolumeSliderElement final : public MediaControlInputElement {
   bool willRespondToMouseClickEvents() override;
   void setVolume(double);
 
+  void defaultEventHandler(Event*) override;
+
  private:
   explicit MediaControlVolumeSliderElement(MediaControls&);
 
-  void defaultEventHandler(Event*) override;
   bool keepEventInNode(Event*) override;
 };