Revert of Plumb decoded video pixel format from GPU process to renderer.

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 f5cd0b2a6d701c573c43461ebe67b65ae113743f..cbf1796db167891402ee265e68414fc4f76f3b61 100644
--- a/media/gpu/vaapi_video_decode_accelerator.cc
+++ b/media/gpu/vaapi_video_decode_accelerator.cc
@@ -637,18 +637,6 @@
   TryFinishSurfaceSetChange();
 }
 
-static VideoPixelFormat BufferFormatToVideoPixelFormat(
-    gfx::BufferFormat format) {
-  switch (format) {
-    case gfx::BufferFormat::BGRA_8888:
-      return PIXEL_FORMAT_ARGB;
-
-    default:
-      LOG(FATAL) << "Add more cases as needed";
-      return PIXEL_FORMAT_UNKNOWN;
-  }
-}
-
 void VaapiVideoDecodeAccelerator::TryFinishSurfaceSetChange() {
   DCHECK_EQ(message_loop_, base::MessageLoop::current());
 
@@ -688,12 +676,10 @@
   DVLOG(1) << "Requesting " << requested_num_pics_
            << " pictures of size: " << requested_pic_size_.ToString();
 
-  VideoPixelFormat format =
-      BufferFormatToVideoPixelFormat(kOutputPictureFormat);
   message_loop_->PostTask(
-      FROM_HERE, base::Bind(&Client::ProvidePictureBuffers, client_,
-                            requested_num_pics_, format, 1, requested_pic_size_,
-                            VaapiPicture::GetGLTextureTarget()));
+      FROM_HERE,
+      base::Bind(&Client::ProvidePictureBuffers, client_, requested_num_pics_,
+                 1, requested_pic_size_, VaapiPicture::GetGLTextureTarget()));
 }
 
 void VaapiVideoDecodeAccelerator::Decode(
@@ -1056,6 +1042,22 @@
     const base::WeakPtr<Client>& decode_client,
     const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner) {
   return false;
+}
+
+static VideoPixelFormat BufferFormatToVideoPixelFormat(
+    gfx::BufferFormat format) {
+  switch (format) {
+    case gfx::BufferFormat::BGRA_8888:
+      return PIXEL_FORMAT_ARGB;
+
+    default:
+      LOG(FATAL) << "Add more cases as needed";
+      return PIXEL_FORMAT_UNKNOWN;
+  }
+}
+
+VideoPixelFormat VaapiVideoDecodeAccelerator::GetOutputFormat() const {
+  return BufferFormatToVideoPixelFormat(kOutputPictureFormat);
 }
 
 bool VaapiVideoDecodeAccelerator::DecodeSurface(