Use ScopedTaskEnvironment instead of MessageLoopForUI in components tests.

components/bookmarks/browser/bookmark_node_data_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/browser/bookmark_node_data.h"
 
 #include <memory>
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_task_environment.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/test/bookmark_test_helpers.h"
 #include "components/bookmarks/test/test_bookmark_client.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "url/gurl.h"
 
 using base::ASCIIToUTF16;
 
 namespace bookmarks {
 
 class BookmarkNodeDataTest : public testing::Test {
  public:
-  BookmarkNodeDataTest() {}
+  BookmarkNodeDataTest()
+      : scoped_task_environment_(
+            base::test::ScopedTaskEnvironment::MainThreadType::UI) {}
 
   void SetUp() override {
     model_ = TestBookmarkClient::CreateModel();
     test::WaitForBookmarkModelToLoad(model_.get());
     bool success = profile_dir_.CreateUniqueTempDir();
     ASSERT_TRUE(success);
   }
 
   void TearDown() override {
     model_.reset();
     bool success = profile_dir_.Delete();
     ASSERT_TRUE(success);
     ui::Clipboard::DestroyClipboardForCurrentThread();
   }
 
   const base::FilePath& GetProfilePath() const {
     return profile_dir_.GetPath();
   }
 
   BookmarkModel* model() { return model_.get(); }
 
  protected:
   ui::Clipboard& clipboard() { return *ui::Clipboard::GetForCurrentThread(); }
 
  private:
   base::ScopedTempDir profile_dir_;
   std::unique_ptr<BookmarkModel> model_;
-  base::MessageLoopForUI loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkNodeDataTest);
 };
 
 namespace {
 
 std::unique_ptr<ui::OSExchangeData::Provider> CloneProvider(
     const ui::OSExchangeData& data) {
   return data.provider().Clone();
 }
@@ skipping 330 matching lines @@
   ASSERT_EQ(1u, read_data.size());
 
   // Verify that the read data contains the same meta info.
   BookmarkNode::MetaInfoMap meta_info_map = read_data.elements[0].meta_info_map;
   EXPECT_EQ(2u, meta_info_map.size());
   EXPECT_EQ("somevalue", meta_info_map["somekey"]);
   EXPECT_EQ("someothervalue", meta_info_map["someotherkey"]);
 }
 
 }  // namespace bookmarks