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

mash/wm/public/interfaces/user_window_controller.mojom

 // Copyright 2015 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.
 
 module mash.wm.mojom;
 
 struct UserWindow {
   uint32 window_id;
   string window_title;
 };
 
-// An observer of user windows within mojom::CONTAINER_USER_WINDOWS.
+// An observer of user windows within mojom::Container::USER_WINDOWS.
 // TODO(msw): Observe focus changes, title/icon changes, etc.
 interface UserWindowObserver {
   // Called when the observer is first added to supply the initial state.
   OnUserWindowObserverAdded(array<UserWindow> user_windows);
 
   OnUserWindowAdded(UserWindow user_window);
   OnUserWindowRemoved(uint32 window_id);
   OnUserWindowTitleChanged(uint32 window_id, string window_title);
 };
 
 // An interface allowing system UIs to manage the set of user windows.
 // TODO(msw): Add minimization, restoration, opening a chooser view, etc.
 interface UserWindowController {
   AddUserWindowObserver(UserWindowObserver observer);
   FocusUserWindow(uint32 window_id);
-};
+};