Remove all remaining traces of MessageLoopProxy.

components/drive/file_write_watcher_unittest.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/drive/file_write_watcher.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ skipping 71 matching lines @@
   std::set<std::string> expected;
   expected.insert("1");
   expected.insert("2");
   expected.insert("3");
 
   base::RunLoop loop;
   TestObserver observer(expected, loop.QuitClosure());
 
   // Set up the watcher.
   scoped_refptr<base::SingleThreadTaskRunner> file_task_runner =
-      content::BrowserThread::GetMessageLoopProxyForThread(
+      content::BrowserThread::GetTaskRunnerForThread(
           content::BrowserThread::FILE);
   FileWriteWatcher watcher(file_task_runner.get());
   watcher.DisableDelayForTesting();
 
   // Start watching and running.
   base::FilePath path1 = GetTempPath("foo.txt");
   base::FilePath path2 = GetTempPath("bar.png");
   base::FilePath path3 = GetTempPath("buz.doc");
   base::FilePath path4 = GetTempPath("mya.mp3");
   watcher.StartWatch(
@@ skipping 11 matching lines @@
 
   // Unwatched write. It shouldn't be notified.
   WriteSomethingAfterStartWatch(path4, true);
 
   // The loop should quit if all the three paths are notified to be written.
   loop.Run();
 }
 
 }  // namespace internal
 }  // namespace drive