Implement InputStub in the host side for chromoting

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;
 
@@ skipping 51 matching lines @@
 
 // Mouse button is released.
 // NEXT ID: 2
 message MouseUpEvent {
   required MouseButton button = 1;
 }
 
 // Defines a mouse event message on the event channel. 
 message MouseEvent {
   // Mouse position information.
-  optional int32 mouse_x = 1;
-  optional int32 mouse_y = 2;
+  optional MouseSetPositionEvent set_position = 1;
 
   // Mouse wheel information.
-  optional int32 wheel_offset_x = 3;
-  optional int32 wheel_offset_y = 4;
+  optional MouseWheelEvent wheel = 2;
 
-  // Mouse button information.
-  optional MouseButton button = 5;
-  optional bool button_down = 6;
+  // Mouse down event.
+  optional MouseDownEvent down = 3;
+
+  // Mouse up event.
+  optional MouseUpEvent up = 4;
 }
 
 // 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;
 }