Plumb decoded video pixel format from GPU process to renderer.

chrome/gpu/arc_gpu_video_decode_accelerator.cc

Index: chrome/gpu/arc_gpu_video_decode_accelerator.cc
diff --git a/chrome/gpu/arc_gpu_video_decode_accelerator.cc b/chrome/gpu/arc_gpu_video_decode_accelerator.cc
index 2766cf1e72a9c643937f3dd405d210f42bcae271..3ede55e9a53fba52d23b93de39af6cffecfb9f8d 100644
--- a/chrome/gpu/arc_gpu_video_decode_accelerator.cc
+++ b/chrome/gpu/arc_gpu_video_decode_accelerator.cc
@@ -304,6 +304,7 @@ void ArcGpuVideoDecodeAccelerator::Flush() {
 
 void ArcGpuVideoDecodeAccelerator::ProvidePictureBuffers(
     uint32_t requested_num_of_buffers,
+    media::VideoPixelFormat output_pixel_format,
     uint32_t textures_per_buffer,
     const gfx::Size& dimensions,
     uint32_t texture_target) {
@@ -312,7 +313,12 @@ void ArcGpuVideoDecodeAccelerator::ProvidePictureBuffers(
            << ", dimensions=" << dimensions.ToString() << ")";
   DCHECK(thread_checker_.CalledOnValidThread());
   coded_size_ = dimensions;
-  output_pixel_format_ = vda_->GetOutputFormat();
+  if ((output_pixel_format_ != media::PIXEL_FORMAT_UNKNOWN) &&
+      (output_pixel_format_ != output_pixel_format)) {
+    arc_client_->OnError(PLATFORM_FAILURE);
+    return;
+  }
+  output_pixel_format_ = output_pixel_format;
 
   VideoFormat video_format;
   switch (output_pixel_format_) {