Remove calls to deprecated MessageLoop methods in components.

components/bookmarks/managed/managed_bookmarks_tracker_unittest.cc

 // Copyright 2014 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/bookmarks/managed/managed_bookmarks_tracker.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/browser/bookmark_model_observer.h"
 #include "components/bookmarks/browser/bookmark_node.h"
 #include "components/bookmarks/browser/bookmark_utils.h"
 #include "components/bookmarks/common/bookmark_pref_names.h"
 #include "components/bookmarks/test/bookmark_test_helpers.h"
 #include "components/bookmarks/test/mock_bookmark_model_observer.h"
 #include "components/bookmarks/test/test_bookmark_client.h"
@@ skipping 15 matching lines @@
   ManagedBookmarksTrackerTest() : managed_node_(NULL) {}
   ~ManagedBookmarksTrackerTest() override {}
 
   void SetUp() override {
     RegisterManagedBookmarksPrefs(prefs_.registry());
   }
 
   void TearDown() override {
     if (model_)
       model_->RemoveObserver(&observer_);
-    loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
   }
 
   void CreateModel(bool is_supervised) {
     // Simulate the creation of the managed node by the BookmarkClient.
     BookmarkPermanentNode* managed_node = new BookmarkPermanentNode(100);
     ManagedBookmarksTracker::LoadInitial(
         managed_node,
         prefs_.GetList(ManagedBookmarksTracker::GetPrefName(is_supervised)),
         101);
     managed_node->set_visible(!managed_node->empty());
@@ skipping 292 matching lines @@
   Mock::VerifyAndClearExpectations(&observer_);
 
   EXPECT_CALL(observer_, BookmarkAllUserNodesRemoved(model_.get(), _));
   model_->RemoveAllUserBookmarks();
   EXPECT_EQ(2, managed_node()->child_count());
   EXPECT_EQ(0, model_->bookmark_bar_node()->child_count());
   Mock::VerifyAndClearExpectations(&observer_);
 }
 
 }  // namespace bookmarks