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

components/sync/driver/pref_names.h

 // 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.
 
 // Constants for the names of various sync preferences, for easier changing.
 
 #ifndef COMPONENTS_SYNC_DRIVER_PREF_NAMES_H_
 #define COMPONENTS_SYNC_DRIVER_PREF_NAMES_H_
 
 #include "build/build_config.h"
 
-namespace sync_driver {
+namespace syncer {
 
 namespace prefs {
 
 extern const char kSyncLastSyncedTime[];
 extern const char kSyncLastPollTime[];
 extern const char kSyncHasAuthError[];
 extern const char kSyncFirstSetupComplete[];
 extern const char kSyncKeepEverythingSynced[];
 
 extern const char kSyncAppList[];
@@ skipping 53 matching lines @@
 
 extern const char kSyncInvalidationVersions[];
 
 extern const char kSyncLastRunVersion[];
 
 extern const char kSyncPassphraseEncryptionTransitionInProgress[];
 extern const char kSyncNigoriStateForPassphraseTransition[];
 
 }  // namespace prefs
 
-}  // namespace sync_driver
+}  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_PREF_NAMES_H_