Revert of Properly route screen orientation IPC messages.

content/renderer/screen_orientation/screen_orientation_dispatcher.cc

 // Copyright 2014 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.
 
 #include "content/renderer/screen_orientation/screen_orientation_dispatcher.h"
 
 #include "content/common/screen_orientation_messages.h"
 
 namespace content {
 
@@ skipping 51 matching lines @@
     pending_callbacks_.Remove(iterator.GetCurrentKey());
   }
 }
 
 void ScreenOrientationDispatcher::lockOrientation(
     blink::WebScreenOrientationLockType orientation,
     blink::WebLockOrientationCallback* callback) {
   CancelPendingLocks();
 
   int request_id = pending_callbacks_.Add(callback);
-  Send(new ScreenOrientationHostMsg_LockRequest(
-      routing_id(), orientation, request_id));
+  Send(new ScreenOrientationHostMsg_LockRequest(orientation, request_id));
 }
 
 void ScreenOrientationDispatcher::unlockOrientation() {
   CancelPendingLocks();
-  Send(new ScreenOrientationHostMsg_Unlock(routing_id()));
+  Send(new ScreenOrientationHostMsg_Unlock);
 }
 
 }  // namespace content