[Sync] Move //components/sync to the syncer namespace, take 2.

components/sync/driver/system_encryptor_unittest.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 "components/sync/driver/system_encryptor.h"
 
 #include <string>
 
 #include "build/build_config.h"
 #include "components/os_crypt/os_crypt_mocker.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace sync_driver {
+namespace syncer {
 
 namespace {
 
 const char kPlaintext[] = "The Magic Words are Squeamish Ossifrage";
 
 class SystemEncryptorTest : public testing::Test {
  protected:
   SystemEncryptor encryptor_;
 };
 
 TEST_F(SystemEncryptorTest, EncryptDecrypt) {
   // SystemEncryptor ends up needing access to the keychain on OS X,
   // so use the mock keychain to prevent prompts.
   ::OSCryptMocker::SetUpWithSingleton();
   std::string ciphertext;
   EXPECT_TRUE(encryptor_.EncryptString(kPlaintext, &ciphertext));
   EXPECT_NE(kPlaintext, ciphertext);
   std::string plaintext;
   EXPECT_TRUE(encryptor_.DecryptString(ciphertext, &plaintext));
   EXPECT_EQ(kPlaintext, plaintext);
   ::OSCryptMocker::TearDown();
 }
 
 }  // namespace
 
-}  // namespace sync_driver
+}  // namespace syncer