Remove remoting::Clipboard::Stop().

remoting/host/input_injector_x11.cc

 // Copyright (c) 2012 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 "remoting/host/input_injector.h"
 
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XTest.h>
 #include <X11/Xlib.h>
 #include <X11/XKBlib.h>
@@ skipping 600 matching lines @@
 
   clipboard_->Start(client_clipboard.Pass());
 }
 
 void InputInjectorX11::Core::Stop() {
   if (!task_runner_->BelongsToCurrentThread()) {
     task_runner_->PostTask(FROM_HERE, base::Bind(&Core::Stop, this));
     return;
   }
 
-  clipboard_->Stop();
+  clipboard_.reset();
 }
 
 }  // namespace
 
 scoped_ptr<InputInjector> InputInjector::Create(
     scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner) {
   scoped_ptr<InputInjectorX11> injector(
       new InputInjectorX11(main_task_runner));
   if (!injector->Init())
     return nullptr;
   return injector.Pass();
 }
 
 }  // namespace remoting