Move move classes to the remoting::protocol namespace. Minor cleanups.

remoting/proto/event.proto

 // Copyright (c) 2010 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;
+package remoting.protocol;
 
 // Defines a keyboard event.
 // NEXT ID: 3
 message KeyEvent {
   // The POSIX key code.
   required int32 key = 1;
   required bool pressed = 2;
 }
 
-enum MouseButton {
-  MouseButtonUndefined = 0;
-  MouseButtonLeft = 1;
-  MouseButtonMiddle = 2;
-  MouseButtonRight = 3;
-}
-
 // Defines a mouse event message on the event channel. 
 message MouseEvent {
+
+  enum MouseButton {
+    BUTTON_UNDEFINED = 0;
+    BUTTON_LEFT = 1;
+    BUTTON_MIDDLE = 2;
+    BUTTON_RIGHT = 3;
+  }
+
   // Mouse position information.
   optional int32 x = 1;
   optional int32 y = 2;
 
   // Mouse wheel information.
   optional int32 wheel_offset_x = 3;
   optional int32 wheel_offset_y = 4;
 
   // Mouse button event.
   optional MouseButton button = 5;
   optional bool button_down = 6;
 }
 
 // Defines an event message on the event channel.
 message Event {
   required int32 timestamp = 1;  // Client timestamp for event
   optional bool dummy = 2;       // Is this a dummy event?
 
   optional KeyEvent key = 3;
   optional MouseEvent mouse = 4;
 }
 
 // Message sent in the event channel.
 message EventMessage {
   repeated Event event = 1;
 }