Add pointer id to the WebMouseEvent's constructors

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 258 matching lines @@
     pointer_event_name = EventTypeNames::pointermove;
 
   pointer_event_init.setView(view);
 
   UpdateMousePointerEventInit(mouse_event, view, &pointer_event_init);
 
   // Create coalesced events init structure only for pointermove.
   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;
       coalesced_event_init.setCancelable(false);
       coalesced_event_init.setBubbles(false);
       UpdateMousePointerEventInit(coalesced_mouse_event, view,
                                   &coalesced_event_init);
       PointerEvent* event = PointerEvent::Create(
           pointer_event_name, coalesced_event_init,
           TimeTicks::FromSeconds(coalesced_mouse_event.TimeStampSeconds()));
@@ skipping 267 matching lines @@
     const WebPointerProperties& properties) const {
   if (properties.pointer_type == WebPointerProperties::PointerType::kMouse)
     return PointerEventFactory::kMouseId;
   IncomingId id(properties.pointer_type, properties.id);
   if (pointer_incoming_id_mapping_.Contains(id))
     return pointer_incoming_id_mapping_.at(id);
   return PointerEventFactory::kInvalidId;
 }
 
 }  // namespace blink