Add VideoPacket struct for video packets. Refactor Decode interface to use it.

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 messages as a unit for transmission in the wire.
 
 syntax = "proto2";
 
+import "control.proto";
 import "event.proto";
 import "video.proto";
 
 option optimize_for = LITE_RUNTIME;
 
 package remoting;
 
-// Defines the message that is sent from the host to the client.
-// Only one of these messages should be present.
-// NEXT ID: 5
-message ChromotingHostMessage {
-  optional InitClientMessage init_client= 1;
-  optional VideoPacket video_packet = 2;
-}
-
 // Defines the message that is sent from the client to the host.
 // Only one of the optional messages should be present.
 // NEXT ID: 7
 message ChromotingClientMessage {
   optional KeyEvent key_event = 1;
   optional MouseSetPositionEvent mouse_set_position_event = 2;
   optional MouseMoveEvent mouse_move_event = 3;
   optional MouseWheelEvent mouse_wheel_event = 4;
   optional MouseDownEvent mouse_down_event = 5;
   optional MouseUpEvent mouse_up_event = 6;
 }