content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/browser/download/download_resource_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 "content/browser/download/download_resource_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
+#include "base/location.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop_proxy.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
+#include "base/thread_task_runner_handle.h"
 #include "content/browser/byte_stream.h"
 #include "content/browser/download/download_create_info.h"
 #include "content/browser/download/download_interrupt_reasons_impl.h"
 #include "content/browser/download/download_manager_impl.h"
 #include "content/browser/download/download_request_handle.h"
 #include "content/browser/download/download_stats.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_interrupt_reasons.h"
@@ skipping 159 matching lines @@
       new DownloadCreateInfo(base::Time::Now(),
                              content_length,
                              request()->net_log(),
                              request_info->HasUserGesture(),
                              request_info->GetPageTransition(),
                              save_info_.Pass()));
 
   // Create the ByteStream for sending data to the download sink.
   scoped_ptr<ByteStreamReader> stream_reader;
   CreateByteStream(
-      base::MessageLoopProxy::current(),
+      base::ThreadTaskRunnerHandle::Get(),
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
       kDownloadByteStreamSize, &stream_writer_, &stream_reader);
   stream_writer_->RegisterCallback(
       base::Bind(&DownloadResourceHandler::ResumeRequest, AsWeakPtr()));
 
   info->download_id = download_id_;
   info->url_chain = request()->url_chain();
   info->referrer_url = GURL(request()->referrer());
   info->mime_type = response->head.mime_type;
   info->remote_address = request()->GetSocketAddress().host();
@@ skipping 335 matching lines @@
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&DeleteOnUIThread, base::Passed(&tab_info_)));
   }
 
   UMA_HISTOGRAM_TIMES("SB2.DownloadDuration",
                       base::TimeTicks::Now() - download_start_time_);
 }
 
 }  // namespace content