More treebuilder (8.2.4.9) Factor out common code for handling character tokens and comments
More treebuilder (8.2.4.9)
Factor out common code for handling character tokens and comments

svn path=/trunk/hubbub/; revision=3941

adamwight/wmf-parsoid-libhubbub,servo/libhubbub,prepare/netsurf_libhubbub,prepare/netsurf_libhubbub,servo/libhubbub,servo/libhubbub,servo/libhubbub,prepare/netsurf_libhubbub,adamwight/wmf-parsoid-libhubbub,Achal-Aggarwal/hibbub,adamwight/wmf-parsoid-libhubbub,prepare/netsurf_libhubbub,Achal-Aggarwal/hibbub,prepare/netsurf_libhubbub,Achal-Aggarwal/hibbub,servo/libhubbub,prepare/netsurf_libhubbub,Achal-Aggarwal/hibbub,adamwight/wmf-parsoid-libhubbub,adamwight/wmf-parsoid-libhubbub