Convert //remoting to use std::unique_ptr

remoting/host/single_window_input_injector_linux.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 "remoting/host/single_window_input_injector.h"
 
 namespace remoting {
 
-scoped_ptr<InputInjector> SingleWindowInputInjector::CreateForWindow(
+std::unique_ptr<InputInjector> SingleWindowInputInjector::CreateForWindow(
     webrtc::WindowId window_id,
-    scoped_ptr<InputInjector> input_injector) {
+    std::unique_ptr<InputInjector> input_injector) {
   return nullptr;
 }
 
 } // namespace remoting