Make cricket::VideoFrame inherit webrtc::VideoFrame.

webrtc/media/base/videocapturer_unittest.cc

Index: webrtc/media/base/videocapturer_unittest.cc
diff --git a/webrtc/media/base/videocapturer_unittest.cc b/webrtc/media/base/videocapturer_unittest.cc
index 25230b5118a80517ff861d5bb473019f58528332..821de5838c8d2acaa9fe82adcc42444914624ac1 100644
--- a/webrtc/media/base/videocapturer_unittest.cc
+++ b/webrtc/media/base/videocapturer_unittest.cc
@@ -91,14 +91,14 @@ TEST_F(VideoCapturerTest, ScreencastScaledOddWidth) {
 
   std::vector<cricket::VideoFormat> formats;
   formats.push_back(cricket::VideoFormat(kWidth, kHeight,
-      cricket::VideoFormat::FpsToInterval(5), cricket::FOURCC_ARGB));
+                                         cricket::VideoFormat::FpsToInterval(5),
+                                         cricket::FOURCC_I420));
   capturer_->ResetSupportedFormats(formats);
 
-  EXPECT_EQ(cricket::CS_RUNNING, capturer_->Start(cricket::VideoFormat(
-      kWidth,
-      kHeight,
-      cricket::VideoFormat::FpsToInterval(30),
-      cricket::FOURCC_ARGB)));
+  EXPECT_EQ(cricket::CS_RUNNING,
+            capturer_->Start(cricket::VideoFormat(
+                kWidth, kHeight, cricket::VideoFormat::FpsToInterval(30),
+                cricket::FOURCC_ANY)));
   EXPECT_TRUE(capturer_->IsRunning());
   EXPECT_EQ(0, renderer_.num_rendered_frames());
   EXPECT_TRUE(capturer_->CaptureFrame());
@@ -245,6 +245,10 @@ TEST_F(VideoCapturerTest, TestRotationAppliedBySourceWhenDifferentWants) {
   EXPECT_EQ(webrtc::kVideoRotation_0, renderer2.rotation());
 }
 
+// TODO(nisse): This test doesn't quite fit here. It tests two things:
+// Aggregation of VideoSinkWants, which is the responsibility of
+// VideoBroadcaster, and translation of VideoSinkWants to actual
+// resolution, which is the responsibility of the VideoAdapter.
 TEST_F(VideoCapturerTest, SinkWantsMaxPixelAndMaxPixelCountStepUp) {
   EXPECT_EQ(cricket::CS_RUNNING,
             capturer_->Start(cricket::VideoFormat(