Add getCoalescedEvents API to PointerEvent

third_party/WebKit/Source/core/events/PointerEvent.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PointerEvent_h
 #define PointerEvent_h
 
 #include "core/events/MouseEvent.h"
 #include "core/events/PointerEventInit.h"
 #include "platform/PlatformTouchPoint.h"
 
 namespace blink {
 
-class PointerEvent final : public MouseEvent {
+class CORE_EXPORT PointerEvent final : public MouseEvent {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static PointerEvent* create(const AtomicString& type,
                               const PointerEventInit& initializer) {
     return new PointerEvent(type, initializer);
   }
 
   int pointerId() const { return m_pointerId; }
   double width() const { return m_width; }
   double height() const { return m_height; }
   float pressure() const { return m_pressure; }
   long tiltX() const { return m_tiltX; }
   long tiltY() const { return m_tiltY; }
   const String& pointerType() const { return m_pointerType; }
   bool isPrimary() const { return m_isPrimary; }
 
   short button() const override { return rawButton(); }
   bool isMouseEvent() const override;
   bool isPointerEvent() const override;
 
   EventDispatchMediator* createMediator() override;
 
+  HeapVector<Member<PointerEvent>> getCoalescedEvents() const;
+
   DECLARE_VIRTUAL_TRACE();
 
  private:
   PointerEvent(const AtomicString&, const PointerEventInit&);
 
   int m_pointerId;
   double m_width;
   double m_height;
   float m_pressure;
   long m_tiltX;
   long m_tiltY;
   String m_pointerType;
   bool m_isPrimary;
+
+  HeapVector<Member<PointerEvent>> m_coalescedEvents;
 };
 
 class PointerEventDispatchMediator final : public EventDispatchMediator {
  public:
   static PointerEventDispatchMediator* create(PointerEvent*);
 
  private:
   explicit PointerEventDispatchMediator(PointerEvent*);
   PointerEvent& event() const;
   DispatchEventResult dispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(PointerEvent);
 
 }  // namespace blink
 
 #endif  // PointerEvent_h