Added PointerEvent.hasPointerCapture API.

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 168 matching lines @@
     bool bestZoomableAreaForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntRect& targetArea, Node*& targetNode);
 
     WebInputEventResult sendContextMenuEvent(const PlatformMouseEvent&, Node* overrideTargetNode = nullptr);
     WebInputEventResult sendContextMenuEventForKey(Element* overrideTargetElement = nullptr);
 
     // Returns whether pointerId is active or not
     bool isPointerEventActive(int);
 
     void setPointerCapture(int, EventTarget*);
     void releasePointerCapture(int, EventTarget*);
+    bool hasPointerCapture(int, EventTarget*);
+
     void elementRemoved(EventTarget*);
 
     void setMouseDownMayStartAutoscroll() { m_mouseDownMayStartAutoscroll = true; }
 
     static WebInputEventResult mergeEventResult(WebInputEventResult resultA, WebInputEventResult resultB);
     static WebInputEventResult toWebInputEventResult(DispatchEventResult);
 
     bool handleAccessKey(const PlatformKeyboardEvent&);
     WebInputEventResult keyEvent(const PlatformKeyboardEvent&);
     void defaultKeyboardEventHandler(KeyboardEvent*);
@@ skipping 212 matching lines @@
     // firing for the current gesture sequence (i.e. until next GestureTapDown).
     bool m_suppressMouseEventsFromGestures;
 
     // TODO(nzolghadr): Temporary until further refactoring
     friend GestureManager;
 };
 
 } // namespace blink
 
 #endif // EventHandler_h