Set relatedtarget for dragleave/enter events

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 46 matching lines @@
       const WebMouseEvent&);
 
   WebInputEventResult DispatchMouseClickIfNeeded(
       const MouseEventWithHitTestResults&,
       Element& mouse_release_target);
 
   WebInputEventResult DispatchDragSrcEvent(const AtomicString& event_type,
                                            const WebMouseEvent&);
   WebInputEventResult DispatchDragEvent(const AtomicString& event_type,
                                         Node* target,
+                                        Node* related_target,
                                         const WebMouseEvent&,
                                         DataTransfer*);
 
   // Resets the internal state of this object.
   void Clear();
 
   void SendBoundaryEvents(EventTarget* exited_target,
                           EventTarget* entered_target,
                           const String& canvas_region_id,
                           const WebMouseEvent&);
@@ skipping 155 matching lines @@
   WebMouseEvent mouse_down_;
 
   LayoutPoint drag_start_pos_;
 
   TaskRunnerTimer<MouseEventManager> fake_mouse_move_event_timer_;
 };
 
 }  // namespace blink
 
 #endif  // MouseEventManager_h