Replace WaitableEvents and ConditionalVariables in VideoRendererBase tests with MessageLoop.

media/filters/ffmpeg_video_decoder_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 <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/message_loop.h"
 #include "base/memory/singleton.h"
 #include "base/string_util.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/decrypt_config.h"
 #include "media/base/gmock_callback_support.h"
 #include "media/base/limits.h"
-#include "media/base/mock_callback.h"
 #include "media/base/mock_filters.h"
 #include "media/base/test_data_util.h"
+#include "media/base/test_helpers.h"
 #include "media/base/video_decoder.h"
 #include "media/base/video_frame.h"
 #include "media/base/video_util.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_glue.h"
 #include "media/filters/ffmpeg_video_decoder.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 using ::testing::_;
 using ::testing::AtMost;
@@ skipping 680 matching lines @@
 
   // Reset while there is still an outstanding read on the demuxer.
   Reset();
 
   // Signal an aborted demuxer read: a NULL video frame should be returned.
   EXPECT_CALL(*this, FrameReady(VideoDecoder::kOk, IsNull()));
   read_cb.Run(DemuxerStream::kAborted, NULL);
 }
 
 }  // namespace media