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

device/nfc/nfc.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 device;
 
 enum NFCErrorType {
   SECURITY,
   NOT_SUPPORTED,
   DEVICE_DISABLED,
   NOT_FOUND,
   INVALID_MESSAGE,
   OPERATION_CANCELLED,
   TIMER_EXPIRED,
   CANNOT_CANCEL,
   IO_ERROR
 };
 
 enum NFCRecordType {
   EMPTY,
   TEXT,
   URL,
   JSON,
-  OPAQUE
+  OPAQUE_RECORD
 };
 
 enum NFCPushTarget {
   TAG,
   PEER,
   ANY
 };
 
 enum NFCWatchMode {
   WEBNFC_ONLY,
@@ skipping 39 matching lines @@
   Watch(NFCWatchOptions options) => (uint32 id, NFCError? error);
   CancelWatch (uint32 id) => (NFCError? error);
   CancelAllWatches () => (NFCError? error);
   SuspendNFCOperations();
   ResumeNFCOperations();
 };
 
 interface NFCClient {
   OnWatch(uint32 id, NFCMessage message);
 };