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

webrtc/video/video_encoder_unittest.cc

Index: webrtc/video/video_encoder_unittest.cc
diff --git a/webrtc/video/video_encoder_unittest.cc b/webrtc/video/video_encoder_unittest.cc
index ac006bb872a0515e77b9788c47bebf0292057781..6902850fdd516833363634982e975c31ac17c52b 100644
--- a/webrtc/video/video_encoder_unittest.cc
+++ b/webrtc/video/video_encoder_unittest.cc
@@ -107,18 +107,15 @@ class VideoEncoderSoftwareFallbackWrapperTest : public ::testing::Test {
 };
 
 void VideoEncoderSoftwareFallbackWrapperTest::EncodeFrame() {
-  frame_.CreateEmptyFrame(kWidth, kHeight, kWidth, (kWidth + 1) / 2,
-                          (kWidth + 1) / 2);
-  memset(frame_.video_frame_buffer()->MutableDataY(), 16,
-         frame_.allocated_size(webrtc::kYPlane));
-  memset(frame_.video_frame_buffer()->MutableDataU(), 128,
-         frame_.allocated_size(webrtc::kUPlane));
-  memset(frame_.video_frame_buffer()->MutableDataV(), 128,
-         frame_.allocated_size(webrtc::kVPlane));
-
+  rtc::scoped_refptr<I420Buffer> buffer = I420Buffer::Create(
+      kWidth, kHeight, kWidth, (kWidth + 1) / 2, (kWidth + 1) / 2);
+  buffer->SetToBlack();
   std::vector<FrameType> types(1, kVideoFrameKey);
-  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
-            fallback_wrapper_.Encode(frame_, nullptr, &types));
+  // VideoFrame frame(buffer, 0, 0, webrtc::kVideoRotation_0);
+  EXPECT_EQ(
+      WEBRTC_VIDEO_CODEC_OK,
+      fallback_wrapper_.Encode(
+          VideoFrame(buffer, 0, 0, webrtc::kVideoRotation_0), nullptr, &types));
 }
 
 void VideoEncoderSoftwareFallbackWrapperTest::UtilizeFallbackEncoder() {