Clean up code for yuv_temporal filter_test.cc
Clean up code for yuv_temporal filter_test.cc

Some cosmetic changes to make the code google c++-style compliant.

BUG=webm:1591

Change-Id: Icef3ccc8ebed7210b6b6f915885d5f648e62da72

ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx