Remove all remaining traces of MessageLoopProxy.

chrome/browser/devtools/devtools_file_system_indexer.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 "chrome/browser/devtools/devtools_file_system_indexer.h"
 
 #include <stddef.h>
 
 #include <iterator>
 
@@ skipping 242 matching lines @@
 
 DevToolsFileSystemIndexer::FileSystemIndexingJob::FileSystemIndexingJob(
     const FilePath& file_system_path,
     const TotalWorkCallback& total_work_callback,
     const WorkedCallback& worked_callback,
     const DoneCallback& done_callback)
     : file_system_path_(file_system_path),
       total_work_callback_(total_work_callback),
       worked_callback_(worked_callback),
       done_callback_(done_callback),
-      current_file_(BrowserThread::GetMessageLoopProxyForThread(
-                        BrowserThread::FILE).get()),
+      current_file_(
+          BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE).get()),
       files_indexed_(0),
       stopped_(false) {
   current_trigrams_set_.resize(kTrigramCount);
   current_trigrams_.reserve(kTrigramCount);
 }
 
 DevToolsFileSystemIndexer::FileSystemIndexingJob::~FileSystemIndexingJob() {}
 
 void DevToolsFileSystemIndexer::FileSystemIndexingJob::Start() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
@@ skipping 202 matching lines @@
   vector<FilePath> file_paths = g_trigram_index.Get().Search(query);
   vector<string> result;
   FilePath path = FilePath::FromUTF8Unsafe(file_system_path);
   vector<FilePath>::const_iterator it = file_paths.begin();
   for (; it != file_paths.end(); ++it) {
     if (path.IsParent(*it))
       result.push_back(it->AsUTF8Unsafe());
   }
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, Bind(callback, result));
 }