Change mojo enums to be scoped enums in the generated C++ bindings.

ui/arc/notification/arc_notification_manager.cc

 // 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 "ui/arc/notification/arc_notification_manager.h"
 
 #include "base/stl_util.h"
 #include "ui/arc/notification/arc_notification_item.h"
 
 namespace arc {
@@ skipping 58 matching lines @@
   ItemMap::iterator it = items_.find(key);
   if (it == items_.end()) {
     VLOG(3) << "Chrome requests to remove a notification (key: " << key
             << "), but it is already gone.";
     return;
   }
 
   scoped_ptr<ArcNotificationItem> item(items_.take_and_erase(it));
 
   arc_bridge_->notifications_instance()->SendNotificationEventToAndroid(
-      key, ARC_NOTIFICATION_EVENT_CLOSED);
+      key, ArcNotificationEvent::CLOSED);
 }
 
 void ArcNotificationManager::SendNotificationClickedOnChrome(
     const std::string& key) {
   if (!items_.contains(key)) {
     VLOG(3) << "Chrome requests to fire a click event on notification (key: "
             << key << "), but it is gone.";
     return;
   }
 
   arc_bridge_->notifications_instance()->SendNotificationEventToAndroid(
-      key, ARC_NOTIFICATION_EVENT_BODY_CLICKED);
+      key, ArcNotificationEvent::BODY_CLICKED);
 }
 
 }  // namespace arc