Firing got/lost pointer capture events

third_party/WebKit/Source/core/input/PointerEventManager.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 PointerEventManager_h
 #define PointerEventManager_h
 
 #include "core/CoreExport.h"
 #include "core/events/PointerEvent.h"
 #include "core/events/PointerEventFactory.h"
@@ skipping 52 matching lines @@
     typedef WillBeHeapHashMap<int, RefPtrWillBeMember<EventTarget>> PointerCapturingMap;
     class EventTargetAttributes {
         DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
     public:
         DEFINE_INLINE_TRACE()
         {
             visitor->trace(target);
         }
         RefPtrWillBeMember<EventTarget> target;
         bool hasRecievedOverEvent;
-        EventTargetAttributes() {}
+        EventTargetAttributes()
+        : target(nullptr)
+        , hasRecievedOverEvent(false) {}
         EventTargetAttributes(PassRefPtrWillBeRawPtr<EventTarget> target,
             bool hasRecievedOverEvent)
         : target(target)
         , hasRecievedOverEvent(hasRecievedOverEvent) {}
     };
 
     void sendNodeTransitionEvents(
         PassRefPtrWillBeRawPtr<EventTarget> exitedTarget,
         PassRefPtrWillBeRawPtr<EventTarget> enteredTarget,
         PassRefPtrWillBeRawPtr<PointerEvent>,
@@ skipping 30 matching lines @@
     WillBeHeapHashMap<int, EventTargetAttributes> m_nodeUnderPointer;
 
     PointerCapturingMap m_pointerCaptureTarget;
     PointerCapturingMap m_pendingPointerCaptureTarget;
     PointerEventFactory m_pointerEventFactory;
 };
 
 } // namespace blink
 
 #endif // PointerEventManager_h