Define the interface for MediaStreamVideoSource.

content/public/renderer/media_stream_video_source_unittest.cc

+// Copyright (c) 2013 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 "content/public/renderer/media_stream_video_sink.h"
+#include "content/public/renderer/media_stream_video_source.h"
+#include "media/base/video_frame.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+class TestTrack : public MediaStreamVideoSink {
+ public:
+  virtual void OnVideoFrame(const scoped_refptr<media::VideoFrame>& frame) {}
+};
+
+class MediaStreamVideoSourceTest
+    : public ::testing::Test,
+      public MediaStreamVideoSource {
+ public:
+  MediaStreamVideoSourceTest() {
+  }
+};
+
+TEST_F(MediaStreamVideoSourceTest, OnVideoFrame) {
+  blink::WebMediaConstraints constrains;
+  TestTrack track;
+  EXPECT_TRUE(Register(&track, constrains));
+  const int kWidth = 640;
+  const int kHeight = 480;
+  scoped_refptr<media::VideoFrame> frame =
+      media::VideoFrame::CreateBlackFrame(gfx::Size(kWidth, kHeight));
+  ASSERT_TRUE(frame.get());
+  OnVideoFrame(frame);
+  EXPECT_TRUE(Unregister(&track));
+}
+
+}  // namespace content