decode_perf_test: drop '_t' from local typenames
decode_perf_test: drop '_t' from local typenames

_t is reserved by posix

+ switch to camelcase
  http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml#Type_Names

Change-Id: I5fdd6319449364f2e930667d3bd54f68ba3cbb2e

gshORTON/webm.libvpx,matanbs/vp982,mwgoldsmith/libvpx,felipebetancur/libvpx,liqianggao/libvpx,thdav/aom,Maria1099/webm.libvpx,charup/https---github.com-webmproject-libvpx-,n4t/libvpx,Topopiccione/libvpx,zofuthan/libvpx,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,ittiamvpx/libvpx-1,kleopatra999/webm.libvpx,reimaginemedia/webm.libvpx,jacklicn/webm.libvpx,altogother/webm.libvpx,running770/libvpx,matanbs/webm.libvpx,felipebetancur/libvpx,mwgoldsmith/vpx,zofuthan/libvpx,ittiamvpx/libvpx-1,Acidburn0zzz/webm.libvpx,Laknot/libvpx,ittiamvpx/libvpx,running770/libvpx,stewnorriss/libvpx,abwiz0086/webm.libvpx,lyx2014/libvpx_c,smarter/aom,openpeer/libvpx_new,mwgoldsmith/libvpx,matanbs/vp982,lyx2014/libvpx_c,reimaginemedia/webm.libvpx,Distrotech/libvpx,kalli123/webm.libvpx,gshORTON/webm.libvpx,Topopiccione/libvpx,webmproject/libvpx,mbebenita/aom,Maria1099/webm.libvpx,luctrudeau/aom,kim42083/webm.libvpx,openpeer/libvpx_new,stewnorriss/libvpx,iniwf/webm.libvpx,ittiamvpx/libvpx-1,webmproject/libvpx,jmvalin/aom,stewnorriss/libvpx,mwgoldsmith/libvpx,ShiftMediaProject/libvpx,smarter/aom,shyamalschandra/libvpx,jmvalin/aom,matanbs/vp982,iniwf/webm.libvpx,Suvarna1488/webm.libvpx,ShiftMediaProject/libvpx,Suvarna1488/webm.libvpx,webmproject/libvpx,Maria1099/webm.libvpx,matanbs/webm.libvpx,n4t/libvpx,Acidburn0zzz/webm.libvpx,abwiz0086/webm.libvpx,Distrotech/libvpx,matanbs/vp982,hsueceumd/test_hui,shareefalis/libvpx,mbebenita/aom,charup/https---github.com-webmproject-libvpx-,Laknot/libvpx,goodleixiao/vpx,ittiamvpx/libvpx-1,shyamalschandra/libvpx,felipebetancur/libvpx,mwgoldsmith/vpx,thdav/aom,matanbs/webm.libvpx,matanbs/webm.libvpx,pcwalton/libvpx,luctrudeau/aom,gshORTON/webm.libvpx,Topopiccione/libvpx,mbebenita/aom,liqianggao/libvpx,ittiamvpx/libvpx,GrokImageCompression/aom,GrokImageCompression/aom,shareefalis/libvpx,pcwalton/libvpx,Acidburn0zzz/webm.libvpx,VTCSecureLLC/libvpx,shacklettbp/aom,hsueceumd/test_hui,Distrotech/libvpx,jdm/libvpx,liqianggao/libvpx,hsueceumd/test_hui,kim42083/webm.libvpx,stewnorriss/libvpx,kleopatra999/webm.libvpx,Laknot/libvpx,goodleixiao/vpx,mbebenita/aom,Suvarna1488/webm.libvpx,iniwf/webm.libvpx,matanbs/vp982,Suvarna1488/webm.libvpx,abwiz0086/webm.libvpx,kim42083/webm.libvpx,kalli123/webm.libvpx,mbebenita/aom,liqianggao/libvpx,lyx2014/libvpx_c,charup/https---github.com-webmproject-libvpx-,charup/https---github.com-webmproject-libvpx-,Distrotech/libvpx,webmproject/libvpx,luctrudeau/aom,running770/libvpx,kalli123/webm.libvpx,jacklicn/webm.libvpx,shacklettbp/aom,mwgoldsmith/libvpx,altogother/webm.libvpx,altogother/webm.libvpx,webmproject/libvpx,ittiamvpx/libvpx,Distrotech/libvpx,hsueceumd/test_hui,hsueceumd/test_hui,jdm/libvpx,kleopatra999/webm.libvpx,Maria1099/webm.libvpx,pcwalton/libvpx,mwgoldsmith/vpx,mbebenita/aom,Laknot/libvpx,Acidburn0zzz/webm.libvpx,Topopiccione/libvpx,Acidburn0zzz/webm.libvpx,kim42083/webm.libvpx,jdm/libvpx,VTCSecureLLC/libvpx,shyamalschandra/libvpx,matanbs/vp982,GrokImageCompression/aom,Maria1099/webm.libvpx,shacklettbp/aom,luctrudeau/aom,zofuthan/libvpx,shyamalschandra/libvpx,matanbs/webm.libvpx,mbebenita/aom,ShiftMediaProject/libvpx,running770/libvpx,ittiamvpx/libvpx,smarter/aom,iniwf/webm.libvpx,pcwalton/libvpx,charup/https---github.com-webmproject-libvpx-,gshORTON/webm.libvpx,goodleixiao/vpx,liqianggao/libvpx,jacklicn/webm.libvpx,VTCSecureLLC/libvpx,felipebetancur/libvpx,abwiz0086/webm.libvpx,kim42083/webm.libvpx,jdm/libvpx,lyx2014/libvpx_c,jacklicn/webm.libvpx,jmvalin/aom,zofuthan/libvpx,jmvalin/aom,gshORTON/webm.libvpx,mwgoldsmith/vpx,kim42083/webm.libvpx,felipebetancur/libvpx,openpeer/libvpx_new,reimaginemedia/webm.libvpx,hsueceumd/test_hui,openpeer/libvpx_new,Acidburn0zzz/webm.libvpx,Topopiccione/libvpx,Laknot/libvpx,iniwf/webm.libvpx,jmvalin/aom,charup/https---github.com-webmproject-libvpx-,goodleixiao/vpx,shareefalis/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,GrokImageCompression/aom,pcwalton/libvpx,mwgoldsmith/libvpx,jmvalin/aom,VTCSecureLLC/libvpx,smarter/aom,shacklettbp/aom,thdav/aom,felipebetancur/libvpx,mbebenita/aom,lyx2014/libvpx_c,zofuthan/libvpx,gshORTON/webm.libvpx,running770/libvpx,n4t/libvpx,n4t/libvpx,openpeer/libvpx_new,shareefalis/libvpx,thdav/aom,goodleixiao/vpx,ittiamvpx/libvpx-1,VTCSecureLLC/libvpx,Suvarna1488/webm.libvpx,shacklettbp/aom,smarter/aom,lyx2014/libvpx_c,abwiz0086/webm.libvpx,kalli123/webm.libvpx,jacklicn/webm.libvpx,Maria1099/webm.libvpx,Topopiccione/libvpx,ittiamvpx/libvpx,jdm/libvpx,luctrudeau/aom,iniwf/webm.libvpx,abwiz0086/webm.libvpx,VTCSecureLLC/libvpx,thdav/aom,kleopatra999/webm.libvpx,reimaginemedia/webm.libvpx,liqianggao/libvpx,kalli123/webm.libvpx,reimaginemedia/webm.libvpx,reimaginemedia/webm.libvpx,ittiamvpx/libvpx,kleopatra999/webm.libvpx,altogother/webm.libvpx,matanbs/webm.libvpx,mwgoldsmith/libvpx,Distrotech/libvpx,shyamalschandra/libvpx,kleopatra999/webm.libvpx,n4t/libvpx,mwgoldsmith/vpx,zofuthan/libvpx,jdm/libvpx,mwgoldsmith/vpx,smarter/aom,stewnorriss/libvpx,kalli123/webm.libvpx,ShiftMediaProject/libvpx,mat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