Remove calls to deprecated MessageLoop methods in chrome.

chrome/browser/extensions/extension_icon_manager_unittest.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/json/json_file_value_serializer.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
+#include "base/run_loop.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/extensions/extension_icon_manager.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/crx_file/id_util.h"
 #include "content/public/test/test_browser_thread.h"
 #include "extensions/common/extension.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/skia_util.h"
@@ skipping 18 matching lines @@
   void ImageLoadObserved() {
     unwaited_image_loads_++;
     if (waiting_) {
       base::MessageLoop::current()->QuitWhenIdle();
     }
   }
 
   void WaitForImageLoad() {
     if (unwaited_image_loads_ == 0) {
       waiting_ = true;
-      base::MessageLoop::current()->Run();
+      base::RunLoop().Run();
       waiting_ = false;
     }
     ASSERT_GT(unwaited_image_loads_, 0);
     unwaited_image_loads_--;
   }
 
  private:
   void SetUp() override {
     file_thread_.Start();
     io_thread_.Start();
@@ skipping 118 matching lines @@
   // Now re-load the icon - we should get the same result bitmap (and not the
   // default icon).
   icon_manager.LoadIcon(profile.get(), extension.get());
   WaitForImageLoad();
   SkBitmap second_icon = icon_manager.GetIcon(extension->id());
   EXPECT_FALSE(gfx::BitmapsAreEqual(second_icon, default_icon));
 
   EXPECT_TRUE(gfx::BitmapsAreEqual(first_icon, second_icon));
 }
 #endif