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

media/mojo/interfaces/media_types.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 media.interfaces;
 
 import "ui/mojo/geometry/geometry.mojom";
 
 // See media/base/buffering_state.h for descriptions.
 // Kept in sync with media::BufferingState via static_asserts.
@@ skipping 20 matching lines @@
   Opus = 12,
   EAC3 = 13,
   PCM_ALAW = 14,
   ALAC = 15,
   AC3 = 16,
   MAX = AC3,
 };
 
 // See media/base/channel_layout.h for descriptions.
 // Kept in sync with media::ChannelLayout via static_asserts.
-// TODO(tim): The bindings generators will always prepend the enum name, should
-// mojom therefore allow enum values starting with numbers?
 enum ChannelLayout {
   k_NONE = 0,
   k_UNSUPPORTED = 1,
   k_MONO = 2,
   k_STEREO = 3,
   k_2_1 = 4,
   k_SURROUND = 5,
   k_4_0 = 6,
   k_2_2 = 7,
   k_QUAD = 8,
@@ skipping 228 matching lines @@
   bool end_of_stream;
 
   // Timestamp in microseconds of the associated frame.
   int64 timestamp_usec;
 
   // Frame data for each plane. Will be null for EOS buffers.
   array<uint8>? y_data;
   array<uint8>? u_data;
   array<uint8>? v_data;
 };