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

components/mus/public/interfaces/input_key_codes.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;
 
 // Cross platform keyboard codes.
 //
 // Because the web has standardized on Win32 keyboard codes, so does mojo.
 enum KeyboardCode {
@@ skipping 24 matching lines @@
   HOME                      = 0x24,
   LEFT                      = 0x25,
   UP                        = 0x26,
   RIGHT                     = 0x27,
   DOWN                      = 0x28,
   SELECT                    = 0x29,
   PRINT                     = 0x2A,
   EXECUTE                   = 0x2B,
   SNAPSHOT                  = 0x2C,
   INSERT                    = 0x2D,
-  DELETE                    = 0x2E,
+  KEY_DELETE                = 0x2E,
   HELP                      = 0x2F,
   NUM_0                     = 0x30,
   NUM_1                     = 0x31,
   NUM_2                     = 0x32,
   NUM_3                     = 0x33,
   NUM_4                     = 0x34,
   NUM_5                     = 0x35,
   NUM_6                     = 0x36,
   NUM_7                     = 0x37,
   NUM_8                     = 0x38,
@@ skipping 121 matching lines @@
   ZOOM                      = 0xFB,
   NONAME                    = 0xFC,
   PA1                       = 0xFD,
   OEM_CLEAR                 = 0xFE,
   UNKNOWN                   = 0,
 
   // Windows does not have a specific key code for AltGr. We use the unused
   // VK_OEM_AX to represent AltGr, matching the behaviour of Firefox on Linux.
   ALTGR                     = 0xE1,
 };