VP9: Only zero counts when !frame_parallel_decoding_mode (2)
VP9: Only zero counts when !frame_parallel_decoding_mode (2)

The counts are never used when frame_parallel_decoding_mode
is set.

Change-Id: I293aa68abadcdd30973adacb9f5f5a3aecf8daa2

smarter/aom,mbebenita/aom,luctrudeau/aom,openpeer/libvpx_new,ittiamvpx/libvpx-1,mwgoldsmith/vpx,luctrudeau/aom,mbebenita/aom,openpeer/libvpx_new,ittiamvpx/libvpx-1,shacklettbp/aom,mwgoldsmith/libvpx,shacklettbp/aom,Topopiccione/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,Topopiccione/libvpx,mwgoldsmith/libvpx,ShiftMediaProject/libvpx,jmvalin/aom,mwgoldsmith/vpx,openpeer/libvpx_new,Topopiccione/libvpx,shacklettbp/aom,webmproject/libvpx,jmvalin/aom,thdav/aom,luctrudeau/aom,mwgoldsmith/vpx,openpeer/libvpx_new,ShiftMediaProject/libvpx,mbebenita/aom,thdav/aom,ittiamvpx/libvpx-1,mbebenita/aom,Topopiccione/libvpx,GrokImageCompression/aom,smarter/aom,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,webmproject/libvpx,luctrudeau/aom,GrokImageCompression/aom,smarter/aom,GrokImageCompression/aom,smarter/aom,mbebenita/aom,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,openpeer/libvpx_new,webmproject/libvpx,thdav/aom,openpeer/libvpx_new,mbebenita/aom,mwgoldsmith/vpx,ShiftMediaProject/libvpx,jmvalin/aom,ShiftMediaProject/libvpx,webmproject/libvpx,GrokImageCompression/aom,mbebenita/aom,thdav/aom,jmvalin/aom,shacklettbp/aom,mwgoldsmith/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,thdav/aom,Topopiccione/libvpx,smarter/aom,thdav/aom,shacklettbp/aom,GrokImageCompression/aom,mwgoldsmith/vpx,mwgoldsmith/vpx,mbebenita/aom,Topopiccione/libvpx,jmvalin/aom,jmvalin/aom,luctrudeau/aom,shacklettbp/aom,webmproject/libvpx,mwgoldsmith/libvpx,smarter/aom,ittiamvpx/libvpx-1