Replace WaitableEvents and ConditionalVariables in VideoRendererBase tests with MessageLoop.

media/base/pipeline_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 <vector>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
 #include "base/threading/simple_thread.h"
 #include "media/base/clock.h"
 #include "media/base/gmock_callback_support.h"
 #include "media/base/media_log.h"
-#include "media/base/mock_callback.h"
 #include "media/base/mock_filters.h"
 #include "media/base/pipeline.h"
+#include "media/base/test_helpers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/size.h"
 
 using ::testing::_;
 using ::testing::DeleteArg;
 using ::testing::DoAll;
 // TODO(scherkus): Remove InSequence after refactoring Pipeline.
 using ::testing::InSequence;
 using ::testing::Invoke;
 using ::testing::InvokeWithoutArgs;
@@ skipping 1175 matching lines @@
 INSTANTIATE_TEARDOWN_TEST(Error, InitAudioRenderer);
 INSTANTIATE_TEARDOWN_TEST(Error, InitVideoRenderer);
 INSTANTIATE_TEARDOWN_TEST(Error, Pausing);
 INSTANTIATE_TEARDOWN_TEST(Error, Flushing);
 INSTANTIATE_TEARDOWN_TEST(Error, Seeking);
 INSTANTIATE_TEARDOWN_TEST(Error, Prerolling);
 INSTANTIATE_TEARDOWN_TEST(Error, Starting);
 INSTANTIATE_TEARDOWN_TEST(Error, Playing);
 
 }  // namespace media