Use base::MessageLoop in more files.

chrome/test/pyautolib/pyautolib.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 "base/base_paths.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
@@ skipping 37 matching lines @@
   // We add this so that pyauto can execute javascript in the renderer and
   // read values back.
   dom_automation_enabled_ = true;
   message_loop_ = GetSharedMessageLoop(base::MessageLoop::TYPE_DEFAULT);
 }
 
 PyUITestBase::~PyUITestBase() {
 }
 
 // static, refer .h for why it needs to be static
-MessageLoop* PyUITestBase::message_loop_ = NULL;
+base::MessageLoop* PyUITestBase::message_loop_ = NULL;
 
 // static
-MessageLoop* PyUITestBase::GetSharedMessageLoop(
+base::MessageLoop* PyUITestBase::GetSharedMessageLoop(
     base::MessageLoop::Type msg_loop_type) {
   if (!message_loop_)  // Create a shared instance of MessageLoop
     message_loop_ = new base::MessageLoop(msg_loop_type);
   return message_loop_;
 }
 
 void PyUITestBase::Initialize(const base::FilePath& browser_dir) {
   UITestBase::SetBrowserDirectory(browser_dir);
 }
 
@@ skipping 82 matching lines @@
         base::StringPrintf("Chrome automation timed out after %d seconds",
                            static_cast<int>(duration.InSeconds())),
         request, true, response);
   } else {
     // TODO(craigdh): Determine specific cause.
     ErrorResponse(
         "Chrome automation failed prior to timing out, did chrome crash?",
         request, false, response);
   }
 }