[Sync] Put everything in sync/api into csync namespace

chrome/browser/extensions/settings/settings_frontend.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/settings/settings_frontend.h"
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/string_number_conversions.h"
 #include "chrome/browser/extensions/extension_event_names.h"
@@ skipping 245 matching lines @@
           observers_,
           profile_path.AppendASCII(
               ExtensionService::kSyncExtensionSettingsDirectoryName));
 }
 
 SettingsFrontend::~SettingsFrontend() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   observers_->RemoveObserver(profile_observer_.get());
 }
 
-SyncableService* SettingsFrontend::GetBackendForSync(
+csync::SyncableService* SettingsFrontend::GetBackendForSync(
     syncable::ModelType type) const {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   std::map<settings_namespace::Namespace, BackendWrappers>::const_iterator
       sync_backends = backends_.find(settings_namespace::SYNC);
   DCHECK(sync_backends != backends_.end());
   switch (type) {
     case syncable::APP_SETTINGS:
       return sync_backends->second.app->GetBackend();
     case syncable::EXTENSION_SETTINGS:
       return sync_backends->second.extension->GetBackend();
@@ skipping 59 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return observers_;
 }
 
 // BackendWrappers
 
 SettingsFrontend::BackendWrappers::BackendWrappers() {}
 SettingsFrontend::BackendWrappers::~BackendWrappers() {}
 
 }  // namespace extensions