Replace MessageLoopProxy with ThreadTaskRunnerHandle in src/sync/.

sync/internal_api/sync_context_proxy_impl.cc

 // 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.
 
 #include "sync/internal_api/sync_context_proxy_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "sync/engine/non_blocking_sync_common.h"
 #include "sync/internal_api/public/sync_context.h"
 
 namespace syncer {
 
 SyncContextProxyImpl::SyncContextProxyImpl(
     const scoped_refptr<base::SequencedTaskRunner>& sync_task_runner,
     const base::WeakPtr<SyncContext>& sync_context)
     : sync_task_runner_(sync_task_runner), sync_context_(sync_context) {
 }
 
 SyncContextProxyImpl::~SyncContextProxyImpl() {
 }
 
 void SyncContextProxyImpl::ConnectTypeToSync(
     ModelType type,
     const DataTypeState& data_type_state,
     const base::WeakPtr<ModelTypeSyncProxyImpl>& type_sync_proxy) {
   VLOG(1) << "ConnectTypeToSync: " << ModelTypeToString(type);
   sync_task_runner_->PostTask(FROM_HERE,
                               base::Bind(&SyncContext::ConnectSyncTypeToWorker,
                                          sync_context_,
                                          type,
                                          data_type_state,
-                                         base::MessageLoopProxy::current(),
+                                         base::ThreadTaskRunnerHandle::Get(),
                                          type_sync_proxy));
 }
 
 void SyncContextProxyImpl::Disconnect(ModelType type) {
   sync_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&SyncContext::DisconnectSyncWorker, sync_context_, type));
 }
 
 scoped_ptr<SyncContextProxy> SyncContextProxyImpl::Clone() const {
   return scoped_ptr<SyncContextProxy>(
       new SyncContextProxyImpl(sync_task_runner_, sync_context_));
 }
 
 }  // namespace syncer