VAVDA: properly mark outputted pictures.

For some very mysterious reason the flag flip that should have been marking
H264Pictures as outputted on OutputPic has vanished. This CL restores it.

BUG=142451
TEST=by hand



Review URL: https://chromiumcodereview.appspot.com/10855142

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151854 0039d316-1c4b-4281-b951-d872f2087c98

content/common/gpu/media/vaapi_h264_decoder.cc

@@ -1506,6 +1506,8 @@ bool VaapiH264Decoder::OutputPic(H264Picture* pic) {
   // No longer need to keep POC->surface mapping, since for decoder this POC
   // is finished with. When the client returns this surface via
   // ReusePictureBuffer(), it will be marked back as available for use.
+  DCHECK(!pic->outputted);
+  pic->outputted = true;
   DecodeSurface* dec_surface = UnassignSurfaceFromPoC(pic->pic_order_cnt);
   if (!dec_surface)
     return false;