(NOT FOR REVIEW) Distinguish between touch and touchmove handler presence

public/web/WebWidgetClient.h

 /*
  * Copyright (C) 2009 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 136 matching lines @@
 
     // Called when a gesture event is handled.
     virtual void didHandleGestureEvent(const WebGestureEvent& event, bool eventCancelled) { }
 
     // Called when overscrolled on main thread.
     virtual void didOverscroll(const WebFloatSize& unusedDelta, const WebFloatSize& accumulatedRootOverScroll, const WebFloatPoint& position, const WebFloatSize& velocity) { }
 
     // Called to update if touch events should be sent.
     virtual void hasTouchEventHandlers(bool) { }
 
+    // Called to update if touch move events should be sent.
+    virtual void hasTouchMoveEventHandlers(bool) { }
+
     // Called during WebWidget::HandleInputEvent for a TouchStart event to inform the embedder
     // of the touch actions that are permitted for this touch.
     virtual void setTouchAction(WebTouchAction touchAction) { }
 
     // Called when value of focused text field gets dirty, e.g. value is
     // modified by script, not by user input.
     virtual void didUpdateTextOfFocusedElementByNonUserInput() { }
 
     // Request the browser to show the IME for current input type.
     virtual void showImeIfNeeded() { }
@@ skipping 17 matching lines @@
     // press or gesture tap.
     // Note: This is called even when the mouse down event is prevent default.
     virtual void onMouseDown(const WebNode& mouseDownNode) { }
 protected:
     ~WebWidgetClient() { }
 };
 
 } // namespace blink
 
 #endif