Remove support for Windows-style keycodes.

remoting/proto/event.proto

 // Copyright (c) 2012 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.
 
 // Protocol for event messages.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package remoting.protocol;
 
 // Defines a keyboard event.
 message KeyEvent {
   // The Windows Virtual Key code.
-  optional int32 keycode = 1;
+  //optional int32 keycode = 1;
   optional bool pressed = 2;
 
   // The USB key code.
   // The upper 16-bits are the USB Page (0x07 for key events).
   // The lower 16-bits are the USB Usage ID (which identifies the actual key).
   optional uint32 usb_keycode = 3;
 }
 
 // Defines a mouse event message on the event channel. 
 message MouseEvent {
@@ skipping 24 matching lines @@
 
 // Defines an event that sends clipboard data between peers.
 message ClipboardEvent {
 
   // The MIME type of the data being sent.
   optional string mime_type = 1;
 
   // The data being sent.
   optional bytes data = 2;
 }