Remove calls to deprecated MessageLoop methods in chrome.

chrome/browser/thumbnails/content_based_thumbnailing_algorithm_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 "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "chrome/browser/thumbnails/content_based_thumbnailing_algorithm.h"
 #include "chrome/browser/thumbnails/simple_thumbnail_crop.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/scrollbar_size.h"
 
 namespace thumbnails {
@@ skipping 132 matching lines @@
 
   base::MessageLoopForUI message_loop;
   content::TestBrowserThread ui_thread(content::BrowserThread::UI,
                                        &message_loop);
   ContentBasedThumbnailingAlgorithm::CreateRetargetedThumbnail(
       source,
       thumbnail_size,
       context,
       base::Bind(&ConsumerCallbackCatcher::UiThreadCallback,
                  base::Unretained(&catcher)));
-  message_loop.RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
   ASSERT_TRUE(catcher.called_back());
   EXPECT_TRUE(catcher.score().good_clipping);
   EXPECT_FALSE(catcher.captured_bitmap().empty());
   EXPECT_LT(catcher.captured_bitmap().width(), source.width());
   EXPECT_LT(catcher.captured_bitmap().height(), source.height());
 }
 
 }  // namespace thumbnails