Use ScopedTaskEnvironment instead of MessageLoop in third_party unit tests.

third_party/zlib/google/zip_reader_unittest.cc

 // Copyright (c) 2011 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 "third_party/zlib/google/zip_reader.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 
 #include <set>
 #include <string>
 
 #include "base/bind.h"
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/md5.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/time/time.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 #include "third_party/zlib/google/zip_internal.h"
 
 using ::testing::Return;
 using ::testing::_;
 
 namespace {
@@ skipping 146 matching lines @@
   // The path to evil.zip in the test data directory.
   base::FilePath evil_zip_file_;
   // The path to evil_via_invalid_utf8.zip in the test data directory.
   base::FilePath evil_via_invalid_utf8_zip_file_;
   // The path to evil_via_absolute_file_name.zip in the test data directory.
   base::FilePath evil_via_absolute_file_name_zip_file_;
   std::set<base::FilePath> test_zip_contents_;
 
   base::ScopedTempDir temp_dir_;
 
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
 };
 
 TEST_F(ZipReaderTest, Open_ValidZipFile) {
   ZipReader reader;
   ASSERT_TRUE(reader.Open(test_zip_file_));
 }
 
 TEST_F(ZipReaderTest, Open_ValidZipPlatformFile) {
   ZipReader reader;
   FileWrapper zip_fd_wrapper(test_zip_file_, FileWrapper::READ_ONLY);
@@ skipping 481 matching lines @@
     ASSERT_TRUE(writer.PrepareOutput());
     ASSERT_TRUE(writer.WriteBytes(kSomeData, kSomeDataLen));
   }
   ASSERT_EQ(kSomeDataLen, file_.GetLength());
   char buf[kSomeDataLen] = {};
   ASSERT_EQ(kSomeDataLen, file_.Read(0LL, buf, kSomeDataLen));
   ASSERT_EQ(std::string(kSomeData), std::string(buf, kSomeDataLen));
 }
 
 }  // namespace zip