Remove redundant I420-to-YV12 conversion in MediaStreamVideoTrack.

media/tools/player_x11/gl_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/gl_video_renderer.h"
 
 #include <X11/Xutil.h>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 99 matching lines @@
   glXMakeCurrent(display_, 0, NULL);
   glXDestroyContext(display_, gl_context_);
 }
 
 void GlVideoRenderer::Paint(media::VideoFrame* video_frame) {
   if (!gl_context_)
     Initialize(video_frame->coded_size(), video_frame->visible_rect());
 
   // 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));
 
   if (glXGetCurrentContext() != gl_context_ ||
       glXGetCurrentDrawable() != window_) {
     glXMakeCurrent(display_, window_, gl_context_);
   }
   for (unsigned int i = 0; i < kNumYUVPlanes; ++i) {
     unsigned int width = video_frame->stride(i);
@@ skipping 110 matching lines @@
   verts[0] = x0; verts[1] = y0;
   verts[2] = x0; verts[3] = y1;
   verts[4] = x1; verts[5] = y0;
   verts[6] = x1; verts[7] = y1;
   glVertexAttribPointer(tc_location, 2, GL_FLOAT, GL_FALSE, 0, verts);
 
   // We are getting called on a thread. Release the context so that it can be
   // made current on the main thread.
   glXMakeCurrent(display_, 0, NULL);
 }