Componentize GCM Part 1: create GCM component and move some files over

components/gcm_driver/system_encryptor.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright (c) 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.
 
-#ifndef COMPONENTS_SYNC_DRIVER_SYSTEM_ENCRYPTOR_H_
-#define COMPONENTS_SYNC_DRIVER_SYSTEM_ENCRYPTOR_H_
+#ifndef COMPONENTS_GCM_DRIVER_SYSTEM_ENCRYPTOR_H_
+#define COMPONENTS_GCM_DRIVER_SYSTEM_ENCRYPTOR_H_
 
 #include "base/compiler_specific.h"
-#include "sync/util/encryptor.h"
+#include "google_apis/gcm/base/encryptor.h"
 
-namespace browser_sync {
+namespace gcm {
 
 // Encryptor that uses the Chrome password manager's encryptor.
-class SystemEncryptor : public syncer::Encryptor {
+class SystemEncryptor : public Encryptor {
  public:
   virtual ~SystemEncryptor();
 
   virtual bool EncryptString(const std::string& plaintext,
                              std::string* ciphertext) OVERRIDE;
 
   virtual bool DecryptString(const std::string& ciphertext,
                              std::string* plaintext) OVERRIDE;
 };
 
-}  // namespace browser_sync
+}  // namespace gcm
 
-#endif  // COMPONENTS_SYNC_DRIVER_SYSTEM_ENCRYPTOR_H_
+#endif  // COMPONENTS_GCM_DRIVER_SYSTEM_ENCRYPTOR_H_