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

components/mus/public/interfaces/input_events.mojom

 // Copyright 2014 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 "components/mus/public/interfaces/input_event_constants.mojom";
 import "components/mus/public/interfaces/input_key_codes.mojom";
 
 struct KeyData {
@@ skipping 86 matching lines @@
   // pressure is not available, it will be set to 0.5 if the button is down.
   float pressure;
   // |tilt_y| and |tilt_z| are in degrees.
   float tilt_y;
   float tilt_z;
 };
 
 struct Event {
   // TODO(sky): rename to type.
   EventType action;
+  // A bitfield of kEventFlag* and kMouseEventFlag* values in
+  // input_event_constants.mojom.
+  //
   // TODO(sky): parts of this should move to PointerData.
-  EventFlags flags;
+  int32 flags;
   // Time in microseconds from when the platform was started.
   // This value accurately orders events w.r.t. to each other but
   // does not position them at an absolute time.
   int64 time_stamp;
   KeyData? key_data;
   PointerData? pointer_data;
 };