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

remoting/proto/internal.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.
 
 // Internal message types that should not be seen outside the protocol
 // directory.
 
 syntax = "proto2";
 
 import "control.proto";
 import "event.proto";
-import "video.proto";
 
 option optimize_for = LITE_RUNTIME;
 
-package remoting;
+package remoting.protocol;
+
+// Represents a message being sent on the control channel.
+message ControlMessage {
+  optional SuggestResolutionRequest suggest_resolution = 1;
+  optional NotifyResolutionRequest notify_resolution = 2;
+}
 
 // TODO(garykac) This is dead, remove remaining references and delete.
 message ChromotingClientMessage {
   optional KeyEvent key_event = 1;
   optional MouseEvent mouse_event = 2;
 }