[Sync] Rename syncable_prefs to sync_preferences.

ios/chrome/browser/browser_state/chrome_browser_state_impl.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 IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_
 #define IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state_impl_io_data.h"
 
 namespace ssl_config {
 class SSLConfigServiceManager;
 }
 
-namespace syncable_prefs {
+namespace sync_preferences {
 class PrefServiceSyncable;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 class PrefProxyConfigTracker;
 
 // This class is the implementation of ChromeBrowserState used for
@@ skipping 44 matching lines @@
 
   // !!! BIG HONKING WARNING !!!
   //  The order of the members below is important. Do not change it unless
   //  you know what you're doing. Also, if adding a new member here make sure
   //  that the declaration occurs AFTER things it depends on as destruction
   //  happens in reverse order of declaration.
 
   // Keep |prefs_| on top for destruction order because |io_data_| and others
   // store pointers to |prefs_| and shall be destructed first.
   scoped_refptr<user_prefs::PrefRegistrySyncable> pref_registry_;
-  std::unique_ptr<syncable_prefs::PrefServiceSyncable> prefs_;
-  std::unique_ptr<syncable_prefs::PrefServiceSyncable> otr_prefs_;
+  std::unique_ptr<sync_preferences::PrefServiceSyncable> prefs_;
+  std::unique_ptr<sync_preferences::PrefServiceSyncable> otr_prefs_;
   std::unique_ptr<ChromeBrowserStateImplIOData::Handle> io_data_;
 
   std::unique_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
   std::unique_ptr<ssl_config::SSLConfigServiceManager>
       ssl_config_service_manager_;
 
   // STOP!!!! DO NOT ADD ANY MORE ITEMS HERE!!!!
   //
   // Instead, make your Service/Manager/whatever object you're hanging off the
   // BrowserState use our BrowserStateKeyedServiceFactory system instead.
   // You can find the design document here:
   //
   //   https://sites.google.com/a/chromium.org/dev/developers/design-documents/profile-architecture
   //
   // and you can read the raw headers here:
   //
   // components/keyed_service/ios/browser_state_dependency_manager.*
   // components/keyed_service/core/keyed_service.h
   // components/keyed_service/ios/browser_state_keyed_service_factory.*
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserStateImpl);
 };
 
 #endif  // IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_