It2Me native messaging: GYP and source refactoring

remoting/host/native_messaging/native_messaging_writer.h

 // Copyright 2013 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.
 
-#ifndef REMOTING_HOST_SETUP_NATIVE_MESSAGING_WRITER_H_
-#define REMOTING_HOST_SETUP_NATIVE_MESSAGING_WRITER_H_
+#ifndef REMOTING_HOST_NATIVE_MESSAGING_NATIVE_MESSAGING_WRITER_H_
+#define REMOTING_HOST_NATIVE_MESSAGING_NATIVE_MESSAGING_WRITER_H_
 
 #include "base/platform_file.h"
 #include "net/base/file_stream.h"
 
 namespace base {
 class Value;
 }  // namespace base
 
 namespace remoting {
 
@@ skipping 10 matching lines @@
 
  private:
   net::FileStream write_stream_;
   bool fail_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeMessagingWriter);
 };
 
 }  // namespace remoting
 
-#endif  // REMOTING_HOST_SETUP_NATIVE_MESSAGING_WRITER_H_
+#endif  // REMOTING_HOST_NATIVE_MESSAGING_NATIVE_MESSAGING_WRITER_H_