Move MutableDataY{,U,V} methods to I420Buffer only.

webrtc/media/engine/webrtcvideoengine2_unittest.cc

Index: webrtc/media/engine/webrtcvideoengine2_unittest.cc
diff --git a/webrtc/media/engine/webrtcvideoengine2_unittest.cc b/webrtc/media/engine/webrtcvideoengine2_unittest.cc
index b9c6604d5208b8fdb04e6d6fc2e8c2e8daa6490c..c81fd88d8d9026648682378a94effd37b1b9be51 100644
--- a/webrtc/media/engine/webrtcvideoengine2_unittest.cc
+++ b/webrtc/media/engine/webrtcvideoengine2_unittest.cc
@@ -66,17 +66,13 @@ void VerifyCodecHasDefaultFeedbackParams(const cricket::VideoCodec& codec) {
       cricket::kRtcpFbParamCcm, cricket::kRtcpFbCcmParamFir)));
 }
 
-static void CreateBlackFrame(webrtc::VideoFrame* video_frame,
-                             int width,
-                             int height) {
-  video_frame->CreateEmptyFrame(
-      width, height, width, (width + 1) / 2, (width + 1) / 2);
-  memset(video_frame->video_frame_buffer()->MutableDataY(), 16,
-         video_frame->allocated_size(webrtc::kYPlane));
-  memset(video_frame->video_frame_buffer()->MutableDataU(), 128,
-         video_frame->allocated_size(webrtc::kUPlane));
-  memset(video_frame->video_frame_buffer()->MutableDataV(), 128,
-         video_frame->allocated_size(webrtc::kVPlane));
+static rtc::scoped_refptr<webrtc::VideoFrameBuffer> CreateBlackFrameBuffer(
+    int width,
+    int height) {
+  rtc::scoped_refptr<webrtc::I420Buffer> buffer =
+      webrtc::I420Buffer::Create(width, height);
+  buffer->SetToBlack();
+  return buffer;
 }
 
 void VerifySendStreamHasRtxTypes(const webrtc::VideoSendStream::Config& config,
@@ -2204,9 +2200,9 @@ TEST_F(WebRtcVideoChannel2Test, EstimatesNtpStartTimeCorrectly) {
   cricket::FakeVideoRenderer renderer;
   EXPECT_TRUE(channel_->SetSink(last_ssrc_, &renderer));
 
-  webrtc::VideoFrame video_frame;
-  CreateBlackFrame(&video_frame, 4, 4);
-  video_frame.set_timestamp(kInitialTimestamp);
+  webrtc::VideoFrame video_frame(CreateBlackFrameBuffer(4, 4),
+                                 kInitialTimestamp, 0,
+                                 webrtc::kVideoRotation_0);
   // Initial NTP time is not available on the first frame, but should still be
   // able to be estimated.
   stream->InjectFrame(video_frame);