Remove EventHandler::m_didStartDrag.

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 62 matching lines @@
 class RenderLayerScrollableArea;
 class RenderObject;
 class ScrollableArea;
 class Scrollbar;
 class TextEvent;
 class VisibleSelection;
 class WheelEvent;
 class Widget;
 
 enum AppendTrailingWhitespace { ShouldAppendTrailingWhitespace, DontAppendTrailingWhitespace };
-enum CheckDragHysteresis { ShouldCheckDragHysteresis, DontCheckDragHysteresis };
+enum class DragInitiator;
 
 class EventHandler : public NoBaseWillBeGarbageCollectedFinalized<EventHandler> {
     WTF_MAKE_NONCOPYABLE(EventHandler);
 public:
     explicit EventHandler(LocalFrame*);
     ~EventHandler();
     void trace(Visitor*);
 
     void clear();
     void nodeWillBeRemoved(Node&);
@@ skipping 175 matching lines @@
 
     void updateMouseEventTargetNode(Node*, const PlatformMouseEvent&, bool fireMouseOverOut);
 
     MouseEventWithHitTestResults prepareMouseEvent(const HitTestRequest&, const PlatformMouseEvent&);
 
     bool dispatchMouseEvent(const AtomicString& eventType, Node* target, int clickCount, const PlatformMouseEvent&, bool setUnder);
     bool dispatchDragEvent(const AtomicString& eventType, Node* target, const PlatformMouseEvent&, DataTransfer*);
 
     void clearDragDataTransfer();
 
-    bool handleDrag(const MouseEventWithHitTestResults&, CheckDragHysteresis);
+    bool handleDrag(const MouseEventWithHitTestResults&, DragInitiator);
     bool tryStartDrag(const MouseEventWithHitTestResults&);
     void clearDragState();
 
     bool dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent&);
 
     bool dragHysteresisExceeded(const FloatPoint&) const;
     bool dragHysteresisExceeded(const IntPoint&) const;
 
     bool passMousePressEventToSubframe(MouseEventWithHitTestResults&, LocalFrame* subframe);
     bool passMouseMoveEventToSubframe(MouseEventWithHitTestResults&, LocalFrame* subframe, HitTestResult* hoveredNode = nullptr);
@@ skipping 98 matching lines @@
     RefPtr<UserGestureToken> m_touchSequenceUserGestureToken;
 
     bool m_touchPressed;
 
     RefPtrWillBeMember<Node> m_scrollGestureHandlingNode;
     bool m_lastGestureScrollOverWidget;
     RefPtrWillBeMember<Node> m_previousGestureScrolledNode;
     RefPtrWillBeMember<Scrollbar> m_scrollbarHandlingScrollGesture;
 
     double m_maxMouseMovedDuration;
-    bool m_didStartDrag;
 
     bool m_longTapShouldInvokeContextMenu;
 
     Timer<EventHandler> m_activeIntervalTimer;
     double m_lastShowPressTimestamp;
     RefPtrWillBeMember<Element> m_lastDeferredTapElement;
 };
 
 } // namespace blink
 
 #endif // EventHandler_h