Remove handlers for user gesture callbacks

public/web/WebUserGestureIndicator.h

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #ifndef WebUserGestureIndicator_h
 #define WebUserGestureIndicator_h
 
 #include "../platform/WebCommon.h"
 
 namespace blink {
 
 class WebUserGestureToken;
 
-class WebUserGestureHandler {
-public:
-    virtual ~WebUserGestureHandler() { }
-    virtual void onGesture() = 0;
-};
-
 class WebUserGestureIndicator {
 public:
     // Returns true if a user gesture is currently being processed.
     BLINK_EXPORT static bool isProcessingUserGesture();
 
     // Returns true if a consumable gesture exists and has been successfully consumed.
     BLINK_EXPORT static bool consumeUserGesture();
 
     // Returns a token for the currently active user gesture. It can be used to
     // continue processing the user gesture later on using a
     // WebScopedUserGesture.
     BLINK_EXPORT static WebUserGestureToken currentUserGestureToken();
-
-    BLINK_EXPORT static void setHandler(WebUserGestureHandler*);
 };
 
 }
 
 #endif // WebUserGestureIndicator_h