Remove setting cancelBubble to false.

third_party/WebKit/Source/core/events/EventDispatcher.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2011 Google Inc. All rights reserved.
@@ skipping 200 matching lines @@
   // Trigger bubbling event handlers, starting at the bottom and working our way
   // up.
   size_t size = m_event->eventPath().size();
   for (size_t i = 1; i < size; ++i) {
     const NodeEventContext& eventContext = m_event->eventPath()[i];
     if (eventContext.currentTargetSameAsTarget()) {
       m_event->setEventPhase(Event::kAtTarget);
     } else if (m_event->bubbles() && !m_event->cancelBubble()) {
       m_event->setEventPhase(Event::kBubblingPhase);
     } else {
-      if (m_event->bubbles() && m_event->cancelBubble() &&
-          eventContext.node() &&
-          eventContext.node()->hasEventListeners(m_event->type()))
-        UseCounter::count(eventContext.node()->document(),
-                          UseCounter::EventCancelBubbleAffected);
       continue;
     }
     eventContext.handleLocalEvents(*m_event);
     if (m_event->propagationStopped())
       return;
   }
   if (m_event->bubbles() && !m_event->cancelBubble()) {
     m_event->setEventPhase(Event::kBubblingPhase);
     m_event->eventPath().windowEventContext().handleLocalEvents(*m_event);
-  } else if (m_event->bubbles() &&
-             m_event->eventPath().windowEventContext().window() &&
-             m_event->eventPath()
-                 .windowEventContext()
-                 .window()
-                 ->hasEventListeners(m_event->type())) {
-    UseCounter::count(m_event->eventPath()
-                          .windowEventContext()
-                          .window()
-                          ->getExecutionContext(),
-                      UseCounter::EventCancelBubbleAffected);
   }
 }
 
 inline void EventDispatcher::dispatchEventPostProcess(
     EventDispatchHandlingState* preDispatchEventHandlerResult) {
   m_event->setTarget(EventPath::eventTargetRespectingTargetRules(*m_node));
   // https://dom.spec.whatwg.org/#concept-event-dispatch
   // 14. Unset event’s dispatch flag, stop propagation flag, and stop immediate
   // propagation flag.
   m_event->setStopPropagation(false);
@@ skipping 64 matching lines @@
   // events to open select boxes.
   if (!m_event->isTrusted() && m_event->isMouseEvent() &&
       m_event->type() == EventTypeNames::mousedown &&
       isHTMLSelectElement(*m_node)) {
     UseCounter::count(m_node->document(),
                       UseCounter::UntrustedMouseDownEventDispatchedToSelect);
   }
 }
 
 }  // namespace blink