Remove redundant I420-to-YV12 conversion in MediaStreamVideoTrack.

media/tools/player_x11/x11_video_renderer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/tools/player_x11/x11_video_renderer.h"
 
 #include <dlfcn.h>
 #include <X11/Xutil.h>
 #include <X11/extensions/Xrender.h>
 #include <X11/extensions/Xcomposite.h>
@@ skipping 82 matching lines @@
   const int visible_height = video_frame->visible_rect().height();
 
   // Check if we need to reallocate our XImage.
   if (image_->width != coded_width || image_->height != coded_height) {
     XDestroyImage(image_);
     image_ = CreateImage(display_, coded_width, coded_height);
   }
 
   // Convert YUV frame to RGB.
   DCHECK(video_frame->format() == media::VideoFrame::YV12 ||
+         video_frame->format() == media::VideoFrame::I420 ||
          video_frame->format() == media::VideoFrame::YV16);
   DCHECK(video_frame->stride(media::VideoFrame::kUPlane) ==
          video_frame->stride(media::VideoFrame::kVPlane));
 
   DCHECK(image_->data);
-  media::YUVType yuv_type =
-      (video_frame->format() == media::VideoFrame::YV12) ?
-      media::YV12 : media::YV16;
+  media::YUVType yuv_type = (video_frame->format() == media::VideoFrame::YV12 ||
+                             video_frame->format() == media::VideoFrame::I420)
+                                ? media::YV12
+                                : media::YV16;
   media::ConvertYUVToRGB32(video_frame->data(media::VideoFrame::kYPlane),
                            video_frame->data(media::VideoFrame::kUPlane),
                            video_frame->data(media::VideoFrame::kVPlane),
                            (uint8*)image_->data, coded_width, coded_height,
                            video_frame->stride(media::VideoFrame::kYPlane),
                            video_frame->stride(media::VideoFrame::kUPlane),
                            image_->bytes_per_line,
                            yuv_type);
 
   if (use_render_) {
@@ skipping 82 matching lines @@
 
     XRenderPictFormat* pictformat = XRenderFindVisualFormat(
         display_,
         attr.visual);
     CHECK(pictformat) << "XRender does not support default visual";
 
     picture_ = XRenderCreatePicture(display_, window_, pictformat, 0, NULL);
     CHECK(picture_) << "Backing picture not created";
   }
 }