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

components/gcm_driver/system_encryptor.cc

-// 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.
 
-#include "components/sync_driver/system_encryptor.h"
+#include "components/gcm_driver/system_encryptor.h"
 
 #include "components/os_crypt/os_crypt.h"
 
-namespace browser_sync {
+namespace gcm {
 
 SystemEncryptor::~SystemEncryptor() {}
 
 bool SystemEncryptor::EncryptString(const std::string& plaintext,
                                     std::string* ciphertext) {
   return ::OSCrypt::EncryptString(plaintext, ciphertext);
 }
 
 bool SystemEncryptor::DecryptString(const std::string& ciphertext,
                                     std::string* plaintext) {
   return ::OSCrypt::DecryptString(ciphertext, plaintext);
 }
 
-}  // namespace browser_sync
+}  // namespace gcm