keep PAGE_KEEP pixel when paging
keep PAGE_KEEP pixel when paging

as webkit does usually

ThomasAdam/vimprobable,ThomasAdam/vimprobable,ThomasAdam/vimprobable,hut/vimprobable,hut/vimprobable,fanglingsu/vimprobable,desyncr/vimprobable,hut/vimprobable,desyncr/vimprobable,DeadDork/vimprobable2,DeadDork/vimprobable2,fanglingsu/vimprobable,desyncr/vimprobable,DeadDork/vimprobable2,fanglingsu/vimprobable,DeadDork/vimprobable2,desyncr/vimprobable