Tie DragState to DragController.

third_party/WebKit/Source/core/input/MouseEventManager.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 MouseEventManager_h
 #define MouseEventManager_h
 
 #include "core/CoreExport.h"
 #include "core/dom/SynchronousMutationObserver.h"
 #include "core/input/BoundaryEventDispatcher.h"
@@ skipping 81 matching lines @@
 
   bool handleDragDropIfPossible(const GestureEventWithHitTestResults&);
 
   WebInputEventResult handleMouseDraggedEvent(
       const MouseEventWithHitTestResults&);
   WebInputEventResult handleMousePressEvent(
       const MouseEventWithHitTestResults&);
   WebInputEventResult handleMouseReleaseEvent(
       const MouseEventWithHitTestResults&);
 
-  static DragState& dragState();
+  DragState& dragState();
 
   void focusDocumentView();
 
   // Resets the state that indicates the next events could cause a drag. It is
   // called when we realize the next events should not cause drag based on the
   // drag heuristics.
   void clearDragHeuristicState();
 
   void dragSourceEndedAt(const WebMouseEvent&, DragOperation);
 
@@ skipping 69 matching lines @@
   // flag, slide focus to its inner element. Returns true if the resulting focus
   // is different from the given element.
   bool slideFocusOnShadowHostIfNecessary(const Element&);
 
   bool dragThresholdExceeded(const IntPoint&) const;
   bool handleDrag(const MouseEventWithHitTestResults&, DragInitiator);
   bool tryStartDrag(const MouseEventWithHitTestResults&);
   void clearDragDataTransfer();
   DataTransfer* createDraggingDataTransfer() const;
 
+  void resetDragState();
+
   // Implementations of |SynchronousMutationObserver|
   void nodeChildrenWillBeRemoved(ContainerNode&) final;
   void nodeWillBeRemoved(Node& nodeToBeRemoved) final;
 
   // NOTE: If adding a new field to this class please ensure that it is
   // cleared in |MouseEventManager::clear()|.
 
   const Member<LocalFrame> m_frame;
   Member<ScrollManager> m_scrollManager;
 
@@ skipping 27 matching lines @@
   WebMouseEvent m_mouseDown;
 
   LayoutPoint m_dragStartPos;
 
   TaskRunnerTimer<MouseEventManager> m_fakeMouseMoveEventTimer;
 };
 
 }  // namespace blink
 
 #endif  // MouseEventManager_h