V4L2SVDA/VAAPIVDA: use visible size from decoder and pass to client

media/gpu/vp8_decoder.cc

Index: media/gpu/vp8_decoder.cc
diff --git a/media/gpu/vp8_decoder.cc b/media/gpu/vp8_decoder.cc
index 9d582ed0a627a3c862fe60e8aec93c38d27f9126..e7bdfc2ec93c64168e2d3a0a05bd32e6361ebda7 100644
--- a/media/gpu/vp8_decoder.cc
+++ b/media/gpu/vp8_decoder.cc
@@ -94,6 +94,7 @@ VP8Decoder::DecodeResult VP8Decoder::Decode() {
   if (!curr_pic_)
     return kRanOutOfSurfaces;
 
+  curr_pic_->visible_rect = gfx::Rect(pic_size_);

[Pawel Osciak, 2017/06/19 06:27:40]

Since VP8Parser does not seem to be aligning to 16x16, I think we should make
visible_size use width/height from the header, while pic_size should be that
visible_size aligned to 16x16...

[johnylin1, 2017/06/19 07:13:28]

We will put to an individual CL as discussed in:
https://codereview.chromium.org/2926593002/diff/160001/media/gpu/vp8_decoder....

   if (!DecodeAndOutputCurrentFrame())
     return kDecodeError;