Add pointer id to the WebMouseEvent's constructors

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 2bbb8654d16dd90a4ce7f35ef1766e82490ffa2c..f65a4c68a8a0b61e8496476431d99803994a3f2e 100644
--- a/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
+++ b/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
@@ -276,9 +276,7 @@ PointerEvent* PointerEventFactory::Create(
   if (pointer_event_name == EventTypeNames::pointermove) {
     HeapVector<Member<PointerEvent>> coalesced_pointer_events;
     for (const auto& coalesced_mouse_event : coalesced_mouse_events) {
-      // TODO(crbug.com/694742): We will set the id from low-level OS events
-      // and enable this DCHECK again.
-      // DCHECK_EQ(mouseEvent.id, coalescedMouseEvent.id);
+      DCHECK_EQ(mouse_event.id, coalesced_mouse_event.id);
 
       DCHECK_EQ(mouse_event.pointer_type, coalesced_mouse_event.pointer_type);
       PointerEventInit coalesced_event_init = pointer_event_init;