Remove redundant I420-to-YV12 conversion in MediaStreamVideoTrack.

media/filters/skcanvas_video_renderer.cc

Index: media/filters/skcanvas_video_renderer.cc
diff --git a/media/filters/skcanvas_video_renderer.cc b/media/filters/skcanvas_video_renderer.cc
index ec3e92fe754be1cb895f0f8f64a3ff289ef6dd94..60fc45bcb7f525721b5213145a94f781ef664021 100644
--- a/media/filters/skcanvas_video_renderer.cc
+++ b/media/filters/skcanvas_video_renderer.cc
@@ -14,6 +14,7 @@ namespace media {
 
 static bool IsEitherYV12OrYV16(media::VideoFrame::Format format) {
   return format == media::VideoFrame::YV12 ||
+         format == media::VideoFrame::I420 ||
          format == media::VideoFrame::YV16 ||
          format == media::VideoFrame::YV12J;
 }
@@ -40,7 +41,7 @@ static bool IsEitherYV12OrYV12AOrYV16OrNative(
 // 2. No flipping nor mirroring.
 // 3. Canvas has pixel format ARGB8888.
 // 4. Canvas is opaque.
-// 5. Frame format is YV12 or YV16.
+// 5. Frame format is YV12, I420 or YV16.
 //
 // TODO(hclam): The fast paint method should support flipping and mirroring.
 // Disable the flipping and mirroring checks once we have it.
@@ -84,6 +85,7 @@ static void FastPaint(
   media::YUVType yuv_type = media::YV16;
   int y_shift = 0;
   if (video_frame->format() == media::VideoFrame::YV12 ||
+      video_frame->format() == media::VideoFrame::I420 ||
       video_frame->format() == media::VideoFrame::YV12A) {
     yuv_type = media::YV12;
     y_shift = 1;
@@ -227,6 +229,7 @@ static void ConvertVideoFrameToBitmap(
 
   switch (video_frame->format()) {
     case media::VideoFrame::YV12:
+    case media::VideoFrame::I420:
     case media::VideoFrame::YV12J:
       media::ConvertYUVToRGB32(
           video_frame->data(media::VideoFrame::kYPlane) + y_offset,