Re-enable DCHECK for pointertypes of coalesced events

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

Index: third_party/WebKit/Source/core/events/PointerEventFactory.cpp
diff --git a/third_party/WebKit/Source/core/events/PointerEventFactory.cpp b/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
index f2840ccc5a70b95b13e2569525b794371f80082e..2e35440d5acc2d8a74f300ca1ca2320adbb687ea 100644
--- a/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
+++ b/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
@@ -265,9 +265,7 @@ PointerEvent* PointerEventFactory::create(
     HeapVector<Member<PointerEvent>> coalescedPointerEvents;
     for (const auto& coalescedMouseEvent : coalescedMouseEvents) {
       DCHECK_EQ(mouseEvent.id, coalescedMouseEvent.id);
-      // TODO(crbug.com/684292): We need further investigation of why the
-      // following DCHECK fails.
-      // DCHECK_EQ(mouseEvent.pointerType, coalescedMouseEvent.pointerType);
+      DCHECK_EQ(mouseEvent.pointerType, coalescedMouseEvent.pointerType);
       PointerEventInit coalescedEventInit = pointerEventInit;
       updateMousePointerEventInit(coalescedMouseEvent, view,
                                   &coalescedEventInit);