Remove calls to deprecated MessageLoop methods in chromecast.

chromecast/media/cma/backend/multizone_backend_unittest.cc

 // Copyright 2016 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 <stdint.h>
 #include <stdlib.h>
 
 #include <algorithm>
 #include <limits>
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/threading/thread_checker.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "chromecast/base/task_runner_impl.h"
 #include "chromecast/media/cma/base/decoder_buffer_adapter.h"
 #include "chromecast/media/cma/base/decoder_config_adapter.h"
 #include "chromecast/public/cast_media_shlib.h"
 #include "chromecast/public/media/cast_decoder_buffer.h"
 #include "chromecast/public/media/decoder_config.h"
 #include "chromecast/public/media/media_pipeline_backend.h"
@@ skipping 313 matching lines @@
       << "\nAverage rendering delay error: "
       << audio_feeder_->average_rendering_delay_error_us();
 }
 
 TEST_P(MultizoneBackendTest, RenderingDelay) {
   std::unique_ptr<base::MessageLoop> message_loop(new base::MessageLoop());
 
   Initialize(GetParam());
   AddEffectsStreams();
   Start();
-  message_loop->Run();
+  base::RunLoop().Run();
 }
 
 INSTANTIATE_TEST_CASE_P(Required,
                         MultizoneBackendTest,
                         ::testing::Values(8000,
                                           11025,
                                           12000,
                                           16000,
                                           22050,
                                           24000,
                                           32000,
                                           44100,
                                           48000));
 
 INSTANTIATE_TEST_CASE_P(Optional,
                         MultizoneBackendTest,
                         ::testing::Values(64000, 88200, 96000));
 
 }  // namespace media
 }  // namespace chromecast