Fix the wrong non-element node handling in EventHanlder and MouseEventManager

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 40 matching lines @@
                                          bool check_for_listener = false);
 
   WebInputEventResult SetMousePositionAndDispatchMouseEvent(
       Node* target_node,
       const String& canvas_region_id,
       const AtomicString& event_type,
       const WebMouseEvent&);
 
   WebInputEventResult DispatchMouseClickIfNeeded(
       const MouseEventWithHitTestResults&,
-      Node* release_node);
+      Element& mouse_release_target);
 
   WebInputEventResult DispatchDragSrcEvent(const AtomicString& event_type,
                                            const WebMouseEvent&);
   WebInputEventResult DispatchDragEvent(const AtomicString& event_type,
                                         Node* target,
                                         const WebMouseEvent&,
                                         DataTransfer*);
 
   // Resets the internal state of this object.
   void Clear();
@@ skipping 60 matching lines @@
   bool CapturesDragging() const;
   void SetCapturesDragging(bool);
 
   void SetMouseDownMayStartAutoscroll() {
     mouse_down_may_start_autoscroll_ = true;
   }
 
   Node* MousePressNode();
   void SetMousePressNode(Node*);
 
-  void SetClickNode(Node*);
+  void SetClickElement(Element*);
   void SetClickCount(int);
 
   bool MouseDownMayStartDrag();
 
  private:
   class MouseEventBoundaryEventDispatcher : public BoundaryEventDispatcher {
     WTF_MAKE_NONCOPYABLE(MouseEventBoundaryEventDispatcher);
 
    public:
     MouseEventBoundaryEventDispatcher(MouseEventManager*,
@@ skipping 65 matching lines @@
   unsigned mouse_pressed_ : 1;
 
   unsigned mouse_down_may_start_autoscroll_ : 1;
   unsigned svg_pan_ : 1;
   unsigned captures_dragging_ : 1;
   unsigned mouse_down_may_start_drag_ : 1;
 
   Member<Node> mouse_press_node_;
 
   int click_count_;
-  Member<Node> click_node_;
+  Member<Element> click_element_;
 
   IntPoint mouse_down_pos_;  // In our view's coords.
   TimeTicks mouse_down_timestamp_;
   WebMouseEvent mouse_down_;
 
   LayoutPoint drag_start_pos_;
 
   TaskRunnerTimer<MouseEventManager> fake_mouse_move_event_timer_;
 };
 
 }  // namespace blink
 
 #endif  // MouseEventManager_h