Reland of New method I420Buffer::SetToBlack.

webrtc/media/base/videobroadcaster_unittest.cc

Index: webrtc/media/base/videobroadcaster_unittest.cc
diff --git a/webrtc/media/base/videobroadcaster_unittest.cc b/webrtc/media/base/videobroadcaster_unittest.cc
index e4e6d3256462b411f2cf4a0391f111ef6b0abda4..d2948bb4372546eb8bbe6fd199fdffd25f0b0bfe 100644
--- a/webrtc/media/base/videobroadcaster_unittest.cc
+++ b/webrtc/media/base/videobroadcaster_unittest.cc
@@ -131,13 +131,16 @@ TEST(VideoBroadcasterTest, SinkWantsBlackFrames) {
 
   FakeVideoRenderer sink2;
   VideoSinkWants wants2;
-  wants1.black_frames = false;
+  wants2.black_frames = false;
   broadcaster.AddOrUpdateSink(&sink2, wants2);
 
-  cricket::WebRtcVideoFrame frame1;
-  frame1.InitToBlack(100, 200, 10000 /*ts*/);
-  // Make it not all-black
-  frame1.video_frame_buffer()->MutableDataU()[0] = 0;
+  rtc::scoped_refptr<webrtc::I420Buffer> buffer(
+      new rtc::RefCountedObject<webrtc::I420Buffer>(100, 200));
+  // Makes it not all black.
+  buffer->InitializeData();
+
+  cricket::WebRtcVideoFrame frame1(
+      buffer, webrtc::kVideoRotation_0, 10 /* timestamp_us */);
   broadcaster.OnFrame(frame1);
   EXPECT_TRUE(sink1.black_frame());
   EXPECT_EQ(10000, sink1.timestamp());
@@ -150,10 +153,8 @@ TEST(VideoBroadcasterTest, SinkWantsBlackFrames) {
   wants2.black_frames = true;
   broadcaster.AddOrUpdateSink(&sink2, wants2);
 
-  cricket::WebRtcVideoFrame frame2;
-  frame2.InitToBlack(100, 200, 30000 /*ts*/);
-  // Make it not all-black
-  frame2.video_frame_buffer()->MutableDataU()[0] = 0;
+  cricket::WebRtcVideoFrame frame2(
+      buffer, webrtc::kVideoRotation_0, 30 /* timestamp_us */);
   broadcaster.OnFrame(frame2);
   EXPECT_FALSE(sink1.black_frame());
   EXPECT_EQ(30000, sink1.timestamp());