Remove all remaining traces of MessageLoopProxy.

content/browser/download/download_request_core.cc

Index: content/browser/download/download_request_core.cc
diff --git a/content/browser/download/download_request_core.cc b/content/browser/download/download_request_core.cc
index fa7687589466a8aba535d64bdf4976cc3a585c01..ba995798aa9adfa292b037848f73c51af227c23c 100644
--- a/content/browser/download/download_request_core.cc
+++ b/content/browser/download/download_request_core.cc
@@ -207,8 +207,8 @@ DownloadRequestCore::DownloadRequestCore(net::URLRequest* request,
   power_save_blocker_.reset(new device::PowerSaveBlocker(
       device::PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
       device::PowerSaveBlocker::kReasonOther, "Download in progress",
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI),
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE)));
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::UI),
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE)));
   DownloadRequestData* request_data = DownloadRequestData::Get(request_);
   if (request_data) {
     save_info_ = request_data->TakeSaveInfo();
@@ -285,10 +285,9 @@ bool DownloadRequestCore::OnResponseStarted(
 
   // Create the ByteStream for sending data to the download sink.
   std::unique_ptr<ByteStreamReader> stream_reader;
-  CreateByteStream(
-      base::ThreadTaskRunnerHandle::Get(),
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
-      kDownloadByteStreamSize, &stream_writer_, &stream_reader);
+  CreateByteStream(base::ThreadTaskRunnerHandle::Get(),
+                   BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
+                   kDownloadByteStreamSize, &stream_writer_, &stream_reader);
   stream_writer_->RegisterCallback(
       base::Bind(&DownloadRequestCore::ResumeRequest, AsWeakPtr()));