Canvas2d: Implement rerouting event by hit region's control.

third_party/WebKit/Source/core/input/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 202 matching lines @@
             visitor->trace(targetFrame);
         }
 
         PlatformTouchPoint point;
         RefPtrWillBeMember<EventTarget> touchTarget;
         RefPtrWillBeMember<LocalFrame> targetFrame;
         FloatPoint adjustedPagePoint;
         FloatSize adjustedRadius;
         bool knownTarget;
         bool consumed;
+        String region;
     };
 
 private:
     static DragState& dragState();
 
     DataTransfer* createDraggingDataTransfer() const;
 
     WebInputEventResult handleMouseMoveOrLeaveEvent(const PlatformMouseEvent&, HitTestResult* hoveredNode = nullptr, bool onlyUpdateScrollbars = false, bool forceLeave = false);
     WebInputEventResult handleMousePressEvent(const MouseEventWithHitTestResults&);
     WebInputEventResult handleMouseFocus(const MouseEventWithHitTestResults&, InputDeviceCapabilities* sourceCapabilities);
@@ skipping 185 matching lines @@
     IntPoint m_mouseDownPos; // In our view's coords.
     double m_mouseDownTimestamp;
     PlatformMouseEvent m_mouseDown;
     RefPtr<UserGestureToken> m_lastMouseDownUserGestureToken;
 
     RefPtrWillBeMember<Node> m_previousWheelScrolledNode;
 
     // 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;
+    using TouchRegionMap = WillBeHeapHashMap<unsigned, String, DefaultHash<unsigned>::Hash, WTF::UnsignedWithZeroKeyHashTraits<unsigned>>;
+    TouchRegionMap m_regionForTouchID;
 
     // 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;
 
     PointerEventManager m_pointerEventManager;
 
     // Prevents firing mousedown, mousemove & mouseup in-between a canceled pointerdown and next pointerup/pointercancel.
@@ skipping 31 matching lines @@
     // scroll which shouldn't propagate can't cause any element to
     // scroll other than the |m_previousGestureScrolledNode|.
     bool m_deltaConsumedForScrollSequence;
 };
 
 } // namespace blink
 
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::EventHandler::TouchInfo);
 
 #endif // EventHandler_h