Code cleanup in bitstream code.
Code cleanup in bitstream code.

Lower case variable names, less code.

Change-Id: I1abc8f592ad2343ab5c76fe2d16262741a4a894a

Acidburn0zzz/webm.libvpx,shacklettbp/aom,kalli123/webm.libvpx,kalli123/webm.libvpx,VTCSecureLLC/libvpx,hsueceumd/test_hui,Maria1099/webm.libvpx,VTCSecureLLC/libvpx,luctrudeau/aom,pcwalton/libvpx,Topopiccione/libvpx,ShiftMediaProject/libvpx,kalli123/webm.libvpx,jdm/libvpx,stewnorriss/libvpx,thdav/aom,zofuthan/libvpx,shacklettbp/aom,VTCSecureLLC/libvpx,gshORTON/webm.libvpx,kleopatra999/webm.libvpx,kalli123/webm.libvpx,felipebetancur/libvpx,matanbs/vp982,sanyaade-teachings/libvpx,goodleixiao/vpx,ittiamvpx/libvpx,jacklicn/webm.libvpx,n4t/libvpx,shyamalschandra/libvpx,Acidburn0zzz/webm.libvpx,charup/https---github.com-webmproject-libvpx-,Topopiccione/libvpx,ittiamvpx/libvpx-1,openpeer/libvpx_new,mwgoldsmith/vpx,turbulenz/libvpx,charup/https---github.com-webmproject-libvpx-,pcwalton/libvpx,jmvalin/aom,felipebetancur/libvpx,goodleixiao/vpx,luctrudeau/aom,altogother/webm.libvpx,smarter/aom,reimaginemedia/webm.libvpx,altogother/webm.libvpx,turbulenz/libvpx,running770/libvpx,VTCSecureLLC/libvpx,shacklettbp/aom,iniwf/webm.libvpx,Laknot/libvpx,jdm/libvpx,ittiamvpx/libvpx-1,cinema6/libvpx,matanbs/webm.libvpx,jmvalin/aom,iniwf/webm.libvpx,shareefalis/libvpx,lyx2014/libvpx_c,Suvarna1488/webm.libvpx,mbebenita/aom,luctrudeau/aom,shacklettbp/aom,shyamalschandra/libvpx,ittiamvpx/libvpx,cinema6/libvpx,abwiz0086/webm.libvpx,Laknot/libvpx,mwgoldsmith/libvpx,webmproject/libvpx,openpeer/libvpx_new,luctrudeau/aom,Topopiccione/libvpx,shacklettbp/aom,felipebetancur/libvpx,GrokImageCompression/aom,Distrotech/libvpx,abwiz0086/webm.libvpx,turbulenz/libvpx,turbulenz/libvpx,kleopatra999/webm.libvpx,luctrudeau/aom,matanbs/webm.libvpx,goodleixiao/vpx,Acidburn0zzz/webm.libvpx,webmproject/libvpx,jacklicn/webm.libvpx,kim42083/webm.libvpx,matanbs/vp982,hsueceumd/test_hui,Topopiccione/libvpx,ShiftMediaProject/libvpx,cinema6/libvpx,iniwf/webm.libvpx,shareefalis/libvpx,Distrotech/libvpx,mwgoldsmith/vpx,jmvalin/aom,mwgoldsmith/vpx,running770/libvpx,Maria1099/webm.libvpx,goodleixiao/vpx,mwgoldsmith/libvpx,jacklicn/webm.libvpx,iniwf/webm.libvpx,lyx2014/libvpx_c,gshORTON/webm.libvpx,Suvarna1488/webm.libvpx,GrokImageCompression/aom,matanbs/webm.libvpx,ShiftMediaProject/libvpx,mbebenita/aom,sanyaade-teachings/libvpx,pcwalton/libvpx,zofuthan/libvpx,stewnorriss/libvpx,mwgoldsmith/vpx,mwgoldsmith/vpx,Maria1099/webm.libvpx,pcwalton/libvpx,iniwf/webm.libvpx,WebRTC-Labs/libvpx,sanyaade-teachings/libvpx,Suvarna1488/webm.libvpx,shareefalis/libvpx,zofuthan/libvpx,pcwalton/libvpx,ittiamvpx/libvpx,ittiamvpx/libvpx-1,mbebenita/aom,stewnorriss/libvpx,ShiftMediaProject/libvpx,jdm/libvpx,Laknot/libvpx,abwiz0086/webm.libvpx,running770/libvpx,jdm/libvpx,thdav/aom,thdav/aom,kalli123/webm.libvpx,matanbs/webm.libvpx,smarter/aom,Suvarna1488/webm.libvpx,shacklettbp/aom,openpeer/libvpx_new,cinema6/libvpx,luctrudeau/aom,mbebenita/aom,Distrotech/libvpx,kim42083/webm.libvpx,hsueceumd/test_hui,GrokImageCompression/aom,abwiz0086/webm.libvpx,jacklicn/webm.libvpx,shyamalschandra/libvpx,stewnorriss/libvpx,running770/libvpx,abwiz0086/webm.libvpx,abwiz0086/webm.libvpx,liqianggao/libvpx,jmvalin/aom,kim42083/webm.libvpx,shareefalis/libvpx,lyx2014/libvpx_c,kleopatra999/webm.libvpx,Laknot/libvpx,altogother/webm.libvpx,reimaginemedia/webm.libvpx,jacklicn/webm.libvpx,GrokImageCompression/aom,lyx2014/libvpx_c,Maria1099/webm.libvpx,stewnorriss/libvpx,kleopatra999/webm.libvpx,jdm/libvpx,felipebetancur/libvpx,Laknot/libvpx,webmproject/libvpx,gshORTON/webm.libvpx,smarter/aom,sanyaade-teachings/libvpx,altogother/webm.libvpx,mwgoldsmith/libvpx,shareefalis/libvpx,hsueceumd/test_hui,hsueceumd/test_hui,kim42083/webm.libvpx,WebRTC-Labs/libvpx,matanbs/vp982,matanbs/vp982,cinema6/libvpx,liqianggao/libvpx,running770/libvpx,mwgoldsmith/libvpx,Laknot/libvpx,turbulenz/libvpx,shyamalschandra/libvpx,shyamalschandra/libvpx,n4t/libvpx,iniwf/webm.libvpx,charup/https---github.com-webmproject-libvpx-,turbulenz/libvpx,reimaginemedia/webm.libvpx,webmproject/libvpx,n4t/libvpx,Suvarna1488/webm.libvpx,ittiamvpx/libvpx-1,pcwalton/libvpx,Distrotech/libvpx,n4t/libvpx,smarter/aom,GrokImageCompression/aom,mbebenita/aom,webmproject/libvpx,liqianggao/libvpx,turbulenz/libvpx,liqianggao/libvpx,matanbs/vp982,thdav/aom,felipebetancur/libvpx,shareefalis/libvpx,matanbs/webm.libvpx,charup/https---github.com-webmproject-libvpx-,charup/https---github.com-webmproject-libvpx-,n4t/libvpx,jdm/libvpx,WebRTC-Labs/libvpx,liqianggao/libvpx,mbebenita/aom,ittiamvpx/libvpx-1,liqianggao/libvpx,Acidburn0zzz/webm.libvpx,jacklicn/webm.libvpx,cinema6/libvpx,smarter/aom,Maria1099/webm.libvpx,Acidburn0zzz/webm.libvpx,webmproject/libvpx,goodleixiao/vpx,goodleixiao/vpx,kleopatra999/webm.libvpx,mbebenita/aom,openpeer/libvpx_new,Maria1099/webm.libvpx,GrokImageCompression/aom,kim42083/webm.libvpx,ShiftMediaProject/libvpx,openpeer/libvpx_new,gshORTON/webm.libvpx,gshORTON/webm.libvpx,thdav/aom,reimaginemedia/webm.libvpx,Distrotech/libvpx,charup/https---github.com-webmproject-libvpx-,VTCSecureLLC/libvpx,thdav/aom,altogother/webm.libvpx,Topopiccione/libvpx,hsueceumd/test_hui,running770/libvpx,Suvarna1488/webm.libvpx,matanbs/webm.libvpx,altogother/webm.libvpx,VTCSecureLLC/libvpx,lyx2014/libvpx_c,WebRTC-Labs/libvpx,WebRTC-Labs/libvpx,sanyaade-teachings/libvpx,mbebenita/aom,turbulenz/libvpx,matanbs/vp982,ittiamvpx/libvpx,kleopatra999/webm.libvpx,lyx2014/libvpx_c,zofuthan/libvpx,zofuthan/libvpx,shyamalschandra/libvpx,jmvalin/aom,Topopiccione/libvpx,reimaginemedia/webm.libvpx,mbebenita/aom,ittiamvpx/libvpx,smarter/aom,gshORTON/webm.libvpx,openpeer/libvpx_new,turbulenz/libvpx,ittiamvpx/libvpx,kim42083/webm.libvpx,mwgoldsmith/vpx,cinema6/libvpx,mwgoldsmith/libvpx,reimaginemedia/webm.libvpx,felipebetancur/libvpx,matanbs/vp982,jmvalin/aom,ittiamvpx/libvpx-1,zofuthan/libvpx,stewnorriss/libvpx,Distrotech/libvpx,mwgoldsmith/libvpx,kalli123/webm.libvpx,Acidburn0zzz/webm.libvpx