Add back DCHECK for pointer type in PointerEventFactory

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 600874c7ae42b4f32662e4179a0b7e46eb7890b6..d38bd6f030f413255ad225d63203a4869da13a4f 100644
--- a/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
+++ b/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
@@ -277,9 +277,7 @@ PointerEvent* PointerEventFactory::create(
       // and enable this DCHECK again.
       // 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);