Add id properties to PointerEvent

ui/events/events_stub.cc

 // Copyright (c) 2013 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 <stdint.h>
 
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "ui/events/event_utils.h"
@@ skipping 38 matching lines @@
 }
 
 int GetChangedMouseButtonFlagsFromNative(
     const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return 0;
 }
 
 PointerDetails GetMousePointerDetailsFromNative(
     const base::NativeEvent& native_event) {
-  return PointerDetails(EventPointerType::POINTER_TYPE_MOUSE);
+  return PointerDetails(EventPointerType::POINTER_TYPE_MOUSE,
+                        PointerEvent::kMousePointerId);
 }
 
 gfx::Vector2d GetMouseWheelOffset(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return gfx::Vector2d();
 }
 
 base::NativeEvent CopyNativeEvent(const base::NativeEvent& event) {
   NOTIMPLEMENTED() <<
       "Don't know how to copy base::NativeEvent for this platform";
@@ skipping 74 matching lines @@
   return 0;
 }
 
 uint16_t UnmodifiedTextFromNative(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return 0;
 }
 
 
 }  // namespace ui