Unify TouchAction classes

third_party/WebKit/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 121 matching lines @@
   virtual void DidOverscroll(const WebFloatSize& overscroll_delta,
                              const WebFloatSize& accumulated_overscroll,
                              const WebFloatPoint& position_in_viewport,
                              const WebFloatSize& velocity_in_viewport) {}
 
   // Called to update if touch events should be sent.
   virtual void HasTouchEventHandlers(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 touch_action) {}
+  virtual void SetTouchAction(blink::WebTouchAction touch_action) {}

[xidachen, 2017/05/05 20:32:45]

So I tried this, and unfortunately it doesn't work. As you see, in the
WebTouchAction.h, in order to include "platform/graphics/TouchAction.h", I have
to use the "if BLINK_IMPLEMENTATION" thing. With that, compiler complains that
"no type named 'WebTouchAction' in namespace 'blink'" at this point. I am not
sure if there is a workaround on this.

 
   // Request the browser to show virtual keyboard for current input type.
   virtual void ShowVirtualKeyboardOnElementFocus() {}
 
   // Request that the browser show a UI for an unhandled tap, if needed.
   // Invoked during the handling of a GestureTap input event whenever the
   // event is not consumed.
   // |tappedPosition| is the point where the mouseDown occurred in client
   // coordinates.
   // |tappedNode| is the node that the mouseDown event hit, provided so the
@@ skipping 26 matching lines @@
   virtual void StartDragging(WebReferrerPolicy,
                              const WebDragData&,
                              WebDragOperationsMask,
                              const WebImage& drag_image,
                              const WebPoint& drag_image_offset) {}
 };
 
 }  // namespace blink
 
 #endif