Added MediaSourceState unit test.

media/blink/video_frame_compositor_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 "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "cc/layers/video_frame_provider.h"
+#include "media/base/gmock_callback_support.h"
 #include "media/base/video_frame.h"
 #include "media/blink/video_frame_compositor.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
 using testing::DoAll;
 using testing::Return;
 
 namespace media {
 
-ACTION_P(RunClosure, closure) {
-  closure.Run();
-}
-
 class VideoFrameCompositorTest : public testing::Test,
                                  public cc::VideoFrameProvider::Client,
                                  public VideoRendererSink::RenderCallback {
  public:
   VideoFrameCompositorTest()
       : tick_clock_(new base::SimpleTestTickClock()),
         compositor_(new VideoFrameCompositor(message_loop.task_runner())),
         did_receive_frame_count_(0) {
     compositor_->SetVideoFrameProviderClient(this);
     compositor_->set_tick_clock_for_testing(
@@ skipping 223 matching lines @@
 
   // Advancing the tick clock should allow a new frame to be requested.
   tick_clock_->Advance(base::TimeDelta::FromMilliseconds(10));
   ASSERT_EQ(opaque_frame_2, compositor()->GetCurrentFrameAndUpdateIfStale());
 
   // Background rendering should tick another render callback.
   StopVideoRendererSink(false);
 }
 
 }  // namespace media