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

components/mus/public/interfaces/window_manager_constants.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 mus.mojom;
 
 import "ui/mojo/geometry/geometry.mojom";
 
 enum WindowManagerErrorCode {
   SUCCESS,
-  ERROR_ACCESS_DENIED
+  ACCESS_DENIED
 };
 
 enum ShowState {
   RESTORED,
   MINIMIZED,
   MAXIMIZED,
   IMMERSIVE,
   PRESENTATION
 };
 
 enum Rotation {
   VALUE_0,
   VALUE_90,
   VALUE_180,
   VALUE_270,
 };
 
-enum ResizeBehavior {
-  NONE = 0,
-  CAN_RESIZE = 1,
-  CAN_MAXIMIZE = 2,
-  CAN_MINIMIZE = 4,
-};
+const int32 kResizeBehaviorNone = 0;
+const int32 kResizeBehaviorCanResize = 1;
+const int32 kResizeBehaviorCanMaximize = 2;
+const int32 kResizeBehaviorCanMinimize = 4;
 
 struct Display {
   int64 id;
   mojo.Rect bounds;
   mojo.Rect work_area;
   float device_pixel_ratio;
   Rotation rotation;
 };
 
 enum WindowType {
   // These constants come from Widget::InitParams. See it for details.
   // TODO: see if we can reduce this set. For example, why do we need both
   // BUBBLE and POPUP.
   WINDOW,
   PANEL,
   WINDOW_FRAMELESS,
   CONTROL,
   POPUP,
   MENU,
   TOOLTIP,
   BUBBLE,
   DRAG,
 };