Clean up detokenize contextualization to be like tokenizer.
Clean up detokenize contextualization to be like tokenizer.

Change-Id: I47174f797df2103da8913c6fb4f4e741817bae82

goodleixiao/vpx,reimaginemedia/webm.libvpx,matanbs/webm.libvpx,mwgoldsmith/vpx,webmproject/libvpx,zofuthan/libvpx,stewnorriss/libvpx,cinema6/libvpx,jmvalin/aom,Distrotech/libvpx,cinema6/libvpx,kalli123/webm.libvpx,ittiamvpx/libvpx-1,shyamalschandra/libvpx,mbebenita/aom,iniwf/webm.libvpx,turbulenz/libvpx,Laknot/libvpx,lyx2014/libvpx_c,turbulenz/libvpx,jmvalin/aom,VTCSecureLLC/libvpx,Maria1099/webm.libvpx,matanbs/webm.libvpx,gshORTON/webm.libvpx,shyamalschandra/libvpx,shyamalschandra/libvpx,abwiz0086/webm.libvpx,ittiamvpx/libvpx-1,abwiz0086/webm.libvpx,shacklettbp/aom,n4t/libvpx,WebRTC-Labs/libvpx,goodleixiao/vpx,sanyaade-teachings/libvpx,kim42083/webm.libvpx,smarter/aom,thdav/aom,altogother/webm.libvpx,turbulenz/libvpx,ittiamvpx/libvpx,running770/libvpx,ittiamvpx/libvpx-1,VTCSecureLLC/libvpx,kleopatra999/webm.libvpx,reimaginemedia/webm.libvpx,webmproject/libvpx,liqianggao/libvpx,cinema6/libvpx,ShiftMediaProject/libvpx,zofuthan/libvpx,shareefalis/libvpx,stewnorriss/libvpx,matanbs/vp982,matanbs/vp982,iniwf/webm.libvpx,VTCSecureLLC/libvpx,goodleixiao/vpx,smarter/aom,vasilvv/esvp8,matanbs/webm.libvpx,Topopiccione/libvpx,pcwalton/libvpx,Acidburn0zzz/webm.libvpx,Topopiccione/libvpx,GrokImageCompression/aom,jacklicn/webm.libvpx,ittiamvpx/libvpx,charup/https---github.com-webmproject-libvpx-,jacklicn/webm.libvpx,Topopiccione/libvpx,shacklettbp/aom,reimaginemedia/webm.libvpx,charup/https---github.com-webmproject-libvpx-,jacklicn/webm.libvpx,Acidburn0zzz/webm.libvpx,reimaginemedia/webm.libvpx,smarter/aom,mwgoldsmith/libvpx,jacklicn/webm.libvpx,charup/https---github.com-webmproject-libvpx-,jdm/libvpx,gshORTON/webm.libvpx,n4t/libvpx,Maria1099/webm.libvpx,mwgoldsmith/vpx,running770/libvpx,pcwalton/libvpx,mwgoldsmith/vpx,luctrudeau/aom,ittiamvpx/libvpx-1,sanyaade-teachings/libvpx,ShiftMediaProject/libvpx,Acidburn0zzz/webm.libvpx,hsueceumd/test_hui,ittiamvpx/libvpx,jdm/libvpx,zofuthan/libvpx,altogother/webm.libvpx,vasilvv/esvp8,felipebetancur/libvpx,abwiz0086/webm.libvpx,turbulenz/libvpx,ShiftMediaProject/libvpx,shareefalis/libvpx,reimaginemedia/webm.libvpx,running770/libvpx,liqianggao/libvpx,jdm/libvpx,Distrotech/libvpx,abwiz0086/webm.libvpx,mwgoldsmith/libvpx,stewnorriss/libvpx,lyx2014/libvpx_c,jmvalin/aom,Laknot/libvpx,Maria1099/webm.libvpx,Acidburn0zzz/webm.libvpx,WebRTC-Labs/libvpx,abwiz0086/webm.libvpx,matanbs/webm.libvpx,jmvalin/aom,cinema6/libvpx,hsueceumd/test_hui,turbulenz/libvpx,mwgoldsmith/libvpx,kim42083/webm.libvpx,kleopatra999/webm.libvpx,vasilvv/esvp8,mbebenita/aom,mbebenita/aom,hsueceumd/test_hui,ittiamvpx/libvpx-1,luctrudeau/aom,Topopiccione/libvpx,matanbs/vp982,shareefalis/libvpx,webmproject/libvpx,shareefalis/libvpx,liqianggao/libvpx,abwiz0086/webm.libvpx,jacklicn/webm.libvpx,gshORTON/webm.libvpx,iniwf/webm.libvpx,mbebenita/aom,openpeer/libvpx_new,charup/https---github.com-webmproject-libvpx-,zofuthan/libvpx,charup/https---github.com-webmproject-libvpx-,hsueceumd/test_hui,shyamalschandra/libvpx,charup/https---github.com-webmproject-libvpx-,sanyaade-teachings/libvpx,n4t/libvpx,Topopiccione/libvpx,turbulenz/libvpx,shareefalis/libvpx,openpeer/libvpx_new,running770/libvpx,matanbs/vp982,Laknot/libvpx,matanbs/webm.libvpx,mbebenita/aom,felipebetancur/libvpx,Maria1099/webm.libvpx,kalli123/webm.libvpx,zofuthan/libvpx,GrokImageCompression/aom,altogother/webm.libvpx,thdav/aom,vasilvv/esvp8,thdav/aom,sanyaade-teachings/libvpx,Suvarna1488/webm.libvpx,felipebetancur/libvpx,kim42083/webm.libvpx,Acidburn0zzz/webm.libvpx,shyamalschandra/libvpx,ittiamvpx/libvpx,thdav/aom,matanbs/webm.libvpx,shacklettbp/aom,hsueceumd/test_hui,kim42083/webm.libvpx,cinema6/libvpx,kalli123/webm.libvpx,openpeer/libvpx_new,matanbs/vp982,luctrudeau/aom,cinema6/libvpx,lyx2014/libvpx_c,openpeer/libvpx_new,jmvalin/aom,Topopiccione/libvpx,shyamalschandra/libvpx,smarter/aom,liqianggao/libvpx,jacklicn/webm.libvpx,GrokImageCompression/aom,kalli123/webm.libvpx,running770/libvpx,mbebenita/aom,goodleixiao/vpx,Acidburn0zzz/webm.libvpx,goodleixiao/vpx,mbebenita/aom,stewnorriss/libvpx,sanyaade-teachings/libvpx,mwgoldsmith/libvpx,lyx2014/libvpx_c,Laknot/libvpx,vasilvv/esvp8,kalli123/webm.libvpx,GrokImageCompression/aom,luctrudeau/aom,stewnorriss/libvpx,mwgoldsmith/libvpx,gshORTON/webm.libvpx,matanbs/vp982,n4t/libvpx,kleopatra999/webm.libvpx,Maria1099/webm.libvpx,shacklettbp/aom,liqianggao/libvpx,VTCSecureLLC/libvpx,Suvarna1488/webm.libvpx,jmvalin/aom,kleopatra999/webm.libvpx,pcwalton/libvpx,VTCSecureLLC/libvpx,gshORTON/webm.libvpx,openpeer/libvpx_new,Maria1099/webm.libvpx,Suvarna1488/webm.libvpx,stewnorriss/libvpx,zofuthan/libvpx,matanbs/vp982,hsueceumd/test_hui,kim42083/webm.libvpx,iniwf/webm.libvpx,pcwalton/libvpx,felipebetancur/libvpx,pcwalton/libvpx,turbulenz/libvpx,webmproject/libvpx,thdav/aom,Laknot/libvpx,goodleixiao/vpx,luctrudeau/aom,n4t/libvpx,gshORTON/webm.libvpx,WebRTC-Labs/libvpx,vasilvv/esvp8,Suvarna1488/webm.libvpx,kleopatra999/webm.libvpx,shacklettbp/aom,Distrotech/libvpx,iniwf/webm.libvpx,altogother/webm.libvpx,altogother/webm.libvpx,ShiftMed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