Revert of Refactoring button field and its type

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

 // Copyright 2016 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 PointerEventFactory_h
 #define PointerEventFactory_h
 
 #include "core/CoreExport.h"
 #include "core/events/PointerEvent.h"
 #include "public/platform/WebPointerProperties.h"
@@ skipping 13 matching lines @@
 // 2.
 class CORE_EXPORT PointerEventFactory {
     DISALLOW_NEW();
 public:
 
     PointerEventFactory();
     ~PointerEventFactory();
 
     PointerEvent* create(
         const AtomicString& mouseEventName, const PlatformMouseEvent&,
+        EventTarget* relatedTarget,
         LocalDOMWindow*);
 
     PointerEvent* create(const AtomicString& type,
         const PlatformTouchPoint&, PlatformEvent::Modifiers,
         const FloatSize& pointRadius,
         const FloatPoint& clientPoint,
         DOMWindow*);
 
     PointerEvent* createPointerCancelEvent(
         const int pointerId, const WebPointerProperties::PointerType);
@@ skipping 67 matching lines @@
     int m_currentId;
     HashMap<IncomingId, int, WTF::PairHash<int, int>, WTF::PairHashTraits<UnsignedHash, UnsignedHash>> m_pointerIncomingIdMapping;
     HashMap<int, PointerAttributes, WTF::IntHash<int>, UnsignedHash> m_pointerIdMapping;
     int m_primaryId[static_cast<int>(WebPointerProperties::PointerType::LastEntry) + 1];
     int m_idCount[static_cast<int>(WebPointerProperties::PointerType::LastEntry) + 1];
 };
 
 } // namespace blink
 
 #endif // PointerEventFactory_h