Remove redundant I420-to-YV12 conversion in MediaStreamVideoTrack.

cc/resources/video_resource_updater.cc

 // Copyright 2013 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 "cc/resources/video_resource_updater.h"
 
 #include "base/bind.h"
 #include "cc/output/gl_renderer.h"
 #include "cc/resources/resource_provider.h"
 #include "gpu/GLES2/gl2extchromium.h"
@@ skipping 43 matching lines @@
     return CreateForHardwarePlanes(video_frame);
   else
     return CreateForSoftwarePlanes(video_frame);
 }
 
 bool VideoResourceUpdater::VerifyFrame(
     const scoped_refptr<media::VideoFrame>& video_frame) {
   switch (video_frame->format()) {
     // Acceptable inputs.
     case media::VideoFrame::YV12:
+    case media::VideoFrame::I420:
     case media::VideoFrame::YV12A:
     case media::VideoFrame::YV16:
     case media::VideoFrame::YV12J:
     case media::VideoFrame::NATIVE_TEXTURE:
 #if defined(VIDEO_HOLE)
     case media::VideoFrame::HOLE:
 #endif  // defined(VIDEO_HOLE)
       return true;
 
     // Unacceptable inputs. ¯\(°_o)/¯
     case media::VideoFrame::UNKNOWN:
-    case media::VideoFrame::I420:
       break;
   }
   return false;
 }
 
 // For frames that we receive in software format, determine the dimensions of
 // each plane in the frame.
 static gfx::Size SoftwarePlaneDimension(
     const scoped_refptr<media::VideoFrame>& input_frame,
     ResourceFormat output_resource_format,
@@ skipping 14 matching lines @@
 #if defined(VIDEO_HOLE)
   if (input_frame_format == media::VideoFrame::HOLE) {
     VideoFrameExternalResources external_resources;
     external_resources.type = VideoFrameExternalResources::HOLE;
     return external_resources;
   }
 #endif  // defined(VIDEO_HOLE)
 
   // Only YUV software video frames are supported.
   DCHECK(input_frame_format == media::VideoFrame::YV12 ||
+         input_frame_format == media::VideoFrame::I420 ||
          input_frame_format == media::VideoFrame::YV12A ||
          input_frame_format == media::VideoFrame::YV12J ||
          input_frame_format == media::VideoFrame::YV16);
   if (input_frame_format != media::VideoFrame::YV12 &&
+      input_frame_format != media::VideoFrame::I420 &&
       input_frame_format != media::VideoFrame::YV12A &&
       input_frame_format != media::VideoFrame::YV12J &&
       input_frame_format != media::VideoFrame::YV16)
     return VideoFrameExternalResources();
 
   bool software_compositor = context_provider_ == NULL;
 
   ResourceFormat output_resource_format = kYUVResourceFormat;
   size_t output_plane_count = media::VideoFrame::NumPlanes(input_frame_format);
 
@@ skipping 228 matching lines @@
   }
 
   PlaneResource recycled_resource(data.resource_id,
                                   data.resource_size,
                                   data.resource_format,
                                   data.mailbox);
   updater->recycled_resources_.push_back(recycled_resource);
 }
 
 }  // namespace cc