chromeos: decode video into NV12 format instead of RGBA in vaapi decoder

media/gpu/vaapi_video_decode_accelerator.cc

Index: media/gpu/vaapi_video_decode_accelerator.cc
diff --git a/media/gpu/vaapi_video_decode_accelerator.cc b/media/gpu/vaapi_video_decode_accelerator.cc
index 4c80a0dec1f4f694bcf9971bb874671c9c8c1546..2fd7a46297be3c50636c50da4d1a0d3f2e92e5f2 100644
--- a/media/gpu/vaapi_video_decode_accelerator.cc
+++ b/media/gpu/vaapi_video_decode_accelerator.cc
@@ -41,7 +41,9 @@ enum VAVDADecoderFailure {
 
 // Buffer format to use for output buffers backing PictureBuffers. This is the
 // format decoded frames in VASurfaces are converted into.
-const gfx::BufferFormat kAllocatePictureFormat = gfx::BufferFormat::BGRA_8888;
+const gfx::BufferFormat kAllocatePictureFormat =
+    gfx::BufferFormat::YUV_420_BIPLANAR;
+
 const gfx::BufferFormat kImportPictureFormat = gfx::BufferFormat::YVU_420;
 }
 
@@ -698,6 +700,9 @@ static VideoPixelFormat BufferFormatToVideoPixelFormat(
     case gfx::BufferFormat::YVU_420:
       return PIXEL_FORMAT_YV12;
 
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
+      return PIXEL_FORMAT_NV12;
+
     default:
       LOG(FATAL) << "Add more cases as needed";
       return PIXEL_FORMAT_UNKNOWN;