Remove calls to deprecated MessageLoop methods in components.

components/sync_driver/glue/sync_backend_host_impl.cc

 // 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.
 
 #include "components/sync_driver/glue/sync_backend_host_impl.h"
 
 #include <map>
 #include <utility>
 #include <vector>
 
@@ skipping 477 matching lines @@
   if (initialized()) {
     CHECK(registrar_.get());
     registrar_->GetModelSafeRoutingInfo(out);
   } else {
     NOTREACHED();
   }
 }
 
 void SyncBackendHostImpl::FlushDirectory() const {
   DCHECK(initialized());
-  registrar_->sync_thread()->message_loop()->PostTask(FROM_HERE,
-      base::Bind(&SyncBackendHostCore::SaveChanges, core_));
+  registrar_->sync_thread()->task_runner()->PostTask(
+      FROM_HERE, base::Bind(&SyncBackendHostCore::SaveChanges, core_));
 }
 
 void SyncBackendHostImpl::RequestBufferedProtocolEventsAndEnableForwarding() {
   registrar_->sync_thread()->task_runner()->PostTask(
       FROM_HERE,
       base::Bind(
           &SyncBackendHostCore::SendBufferedProtocolEventsAndEnableForwarding,
           core_));
 }
 
@@ skipping 354 matching lines @@
     const syncer::SyncManager::ClearServerDataCallback& frontend_callback) {
   DCHECK(ui_thread_->BelongsToCurrentThread());
   frontend_callback.Run();
 }
 
 }  // namespace browser_sync
 
 #undef SDVLOG
 
 #undef SLOG