Add use count for click retargeting due to capture

third_party/WebKit/Source/core/input/PointerEventManager.cpp

 // 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.
 
 #include "core/input/PointerEventManager.h"
 
 #include "core/dom/DocumentUserGestureToken.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/shadow/FlatTreeTraversal.h"
 #include "core/events/MouseEvent.h"
@@ skipping 151 matching lines @@
   if (!RuntimeEnabledFeatures::pointerEventEnabled())
     return WebInputEventResult::NotHandled;
   if (!checkForListener || target->hasEventListeners(eventType)) {
     UseCounter::count(m_frame, UseCounter::PointerEventDispatch);
     if (eventType == EventTypeNames::pointerdown)
       UseCounter::count(m_frame, UseCounter::PointerEventDispatchPointerDown);
 
     DCHECK(!m_dispatchingPointerId);
     AutoReset<int> dispatchHolder(&m_dispatchingPointerId, pointerId);
     DispatchEventResult dispatchResult = target->dispatchEvent(pointerEvent);
+
     return EventHandlingUtil::toWebInputEventResult(dispatchResult);
   }
   return WebInputEventResult::NotHandled;
 }
 
 EventTarget* PointerEventManager::getEffectiveTargetForPointerEvent(
     EventTarget* target,
     int pointerId) {
   if (EventTarget* capturingTarget = getCapturingNode(pointerId))
     return capturingTarget;
@@ skipping 317 matching lines @@
     }
     result = EventHandlingUtil::mergeEventResult(
         result,
         m_mouseEventManager->dispatchMouseEvent(
             mouseTarget, mouseEventType, mouseEvent, canvasRegionId, nullptr));
 
     if (selectionOverLink && mouseTarget &&
         mouseEventType == EventTypeNames::mouseup) {
       WebInputEventResult clickEventResult =
           m_mouseEventManager->dispatchMouseClickIfNeeded(
-              mouseTarget->toNode(), mouseEvent, canvasRegionId);
+              mouseTarget->toNode(), mouseEvent, canvasRegionId, target);
       result = EventHandlingUtil::mergeEventResult(clickEventResult, result);
     }
   }
 
   if (pointerEvent->type() == EventTypeNames::pointerup ||
       pointerEvent->type() == EventTypeNames::pointercancel) {
     releasePointerCapture(pointerEvent->pointerId());
     // Send got/lostpointercapture rightaway if necessary.
     processPendingPointerCapture(pointerEvent);
 
@@ skipping 196 matching lines @@
     if (firstId > uniqueTouchEventId)
       return false;
     m_touchIdsForCanceledPointerdowns.takeFirst();
     if (firstId == uniqueTouchEventId)
       return true;
   }
   return false;
 }
 
 }  // namespace blink