Comment a DCHECK that fails temporarily

third_party/WebKit/Source/core/events/PointerEventFactory.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/events/PointerEventFactory.h"
 
 #include "core/frame/FrameView.h"
 #include "platform/geometry/FloatSize.h"
 
 namespace blink {
@@ skipping 251 matching lines @@
   pointerEventInit.setView(view);
 
   updateMousePointerEventInit(mouseEvent, view, &pointerEventInit);
 
   // Create coalesced events init structure only for pointermove.
   if (pointerEventName == EventTypeNames::pointermove) {
     HeapVector<Member<PointerEvent>> coalescedPointerEvents;
     for (const auto& coalescedMouseEvent : coalescedMouseEvents) {
       DCHECK_EQ(mouseEvent.pointerProperties().id,
                 coalescedMouseEvent.pointerProperties().id);
-      DCHECK_EQ(mouseEvent.pointerProperties().pointerType,
-                coalescedMouseEvent.pointerProperties().pointerType);
+      // TODO(crbug.com/684292): We need further investigation of why the
+      // following DCHECK fails.
+      // DCHECK_EQ(mouseEvent.pointerProperties().pointerType,
+      //          coalescedMouseEvent.pointerProperties().pointerType);
       PointerEventInit coalescedEventInit = pointerEventInit;
       updateMousePointerEventInit(coalescedMouseEvent, view,
                                   &coalescedEventInit);
       coalescedPointerEvents.push_back(
           PointerEvent::create(pointerEventName, coalescedEventInit));
     }
     pointerEventInit.setCoalescedEvents(coalescedPointerEvents);
   }
 
   return PointerEvent::create(pointerEventName, pointerEventInit);
@@ skipping 237 matching lines @@
     const WebPointerProperties& properties) const {
   if (properties.pointerType == WebPointerProperties::PointerType::Mouse)
     return PointerEventFactory::s_mouseId;
   IncomingId id(properties.pointerType, properties.id);
   if (m_pointerIncomingIdMapping.contains(id))
     return m_pointerIncomingIdMapping.get(id);
   return PointerEventFactory::s_invalidId;
 }
 
 }  // namespace blink