Added PointerEvent firing on touch events.

Source/core/page/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 383 matching lines @@
 
     // The target of each active touch point indexed by the touch ID.
     using TouchTargetMap = WillBeHeapHashMap<unsigned, RefPtrWillBeMember<EventTarget>, DefaultHash<unsigned>::Hash, WTF::UnsignedWithZeroKeyHashTraits<unsigned>>;
     TouchTargetMap m_targetForTouchID;
 
     // If set, the document of the active touch sequence. Unset if no touch sequence active.
     RefPtrWillBeMember<Document> m_touchSequenceDocument;
     RefPtr<UserGestureToken> m_touchSequenceUserGestureToken;
 
     bool m_touchPressed;
+    unsigned m_primaryPointerId;
 
     RefPtrWillBeMember<Node> m_scrollGestureHandlingNode;
     bool m_lastGestureScrollOverWidget;
     // The most recent element to scroll natively during this scroll
     // sequence. Null if no native element has scrolled this scroll
     // sequence, or if the most recent element to scroll used scroll
     // customization.
     RefPtrWillBeMember<Node> m_previousGestureScrolledNode;
     RefPtrWillBeMember<Scrollbar> m_scrollbarHandlingScrollGesture;
 
@@ skipping 11 matching lines @@
     // scroll sequence in this frame, or any child frames. Only used
     // with ScrollCustomization. If some delta has been consumed, a
     // scroll which shouldn't propagate can't cause any element to
     // scroll other than the |m_previousGestureScrolledNode|.
     bool m_deltaConsumedForScrollSequence;
 };
 
 } // namespace blink
 
 #endif // EventHandler_h