[Sync] Rename csync namespace to syncer

chrome/browser/sync/backend_unrecoverable_error_handler.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 "base/callback.h"
 
 #include "chrome/browser/sync/backend_unrecoverable_error_handler.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 
 using content::BrowserThread;
 
 namespace browser_sync {
 
 BackendUnrecoverableErrorHandler::BackendUnrecoverableErrorHandler(
-    const csync::WeakHandle<ProfileSyncService>& service) : service_(service) {
+    const syncer::WeakHandle<ProfileSyncService>& service) : service_(service) {
 }
 
 BackendUnrecoverableErrorHandler::~BackendUnrecoverableErrorHandler() {
 }
 
 void BackendUnrecoverableErrorHandler::OnUnrecoverableError(
     const tracked_objects::Location& from_here,
     const std::string& message) {
   service_.Call(FROM_HERE,
                 &ProfileSyncService::OnUnrecoverableError,
                 from_here,
                 message);
 }
 
 }  // namespace browser_sync