Modify gesture event types for WebView-tag scroll bubbling.

Source/core/events/GestureEvent.h

 /*
  * 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:
  *  * 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 copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 27 matching lines @@
     ~GestureEvent() override { }
 
     static PassRefPtrWillBeRawPtr<GestureEvent> create(PassRefPtrWillBeRawPtr<AbstractView>, const PlatformGestureEvent&);
 
     bool isGestureEvent() const override;
 
     const AtomicString& interfaceName() const override;
 
     float deltaX() const { return m_deltaX; }
     float deltaY() const { return m_deltaY; }
+    float velocityX() const { return m_velocityX; }
+    float velocityY() const { return m_velocityY; }
+    bool inertial() const { return m_inertial; }
+
+    int resendingPluginId() const { return m_resendingPluginId; }
 
     PassRefPtrWillBeRawPtr<EventDispatchMediator> createMediator() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     GestureEvent();
-    GestureEvent(const AtomicString& type, PassRefPtrWillBeRawPtr<AbstractView>, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, float deltaX, float deltaY, double uiTimeStamp);
+    GestureEvent(const AtomicString& type, PassRefPtrWillBeRawPtr<AbstractView>, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, float deltaX, float deltaY, float velocityX, float velocityY, bool inertial, double uiTimeStamp, int resendingPluginId);
 
     float m_deltaX;
     float m_deltaY;
+    float m_velocityX;
+    float m_velocityY;
+    bool m_inertial;
+
+    int m_resendingPluginId;
 };
 
 class GestureEventDispatchMediator final : public EventDispatchMediator {
 public:
     static PassRefPtrWillBeRawPtr<GestureEventDispatchMediator> create(PassRefPtrWillBeRawPtr<GestureEvent> gestureEvent)
     {
         return adoptRefWillBeNoop(new GestureEventDispatchMediator(gestureEvent));
     }
 
 private:
     explicit GestureEventDispatchMediator(PassRefPtrWillBeRawPtr<GestureEvent>);
 
     GestureEvent& event() const;
 
     bool dispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(GestureEvent);
 
 } // namespace blink
 
 #endif // GestureEvent_h