NEW_MULTISYMBOL: remove compressed header always.

Enable the RESTRICT_COMPRESSED_HDR experiment when
NEW_MULTISYMBOL is on and apply when there is no
backward update also.

Change-Id: I5f6812df2cb3f9bc32fe533b2689fd51235aedbc

av1/common/onyxc_int.h

@@ -1304,11 +1304,13 @@ static INLINE int all_lossless(const AV1_COMMON *cm, const MACROBLOCKD *xd) {
 
 static INLINE int use_compressed_header(const AV1_COMMON *cm) {
   (void)cm;
-#if CONFIG_RESTRICT_COMPRESSED_HDR
+#if CONFIG_RESTRICT_COMPRESSED_HDR && CONFIG_NEW_MULTISYMBOL
+  return 0;
+#elif CONFIG_RESTRICT_COMPRESSED_HDR
   return cm->refresh_frame_context == REFRESH_FRAME_CONTEXT_FORWARD;
 #else
   return 1;
-#endif  // CONFIG_RESTRICT_COMPRESSED_HDR
+#endif  // CONFIG_RESTRICT_COMPRESSED_HDR && CONFIG_NEW_MULTISYMBOL
 }
 
 #ifdef __cplusplus

configure

@@ -568,6 +568,7 @@ post_process_cmdline() {
     enabled rect_tx_ext && enable_feature rect_tx
     enabled cfl && enable_feature smooth_hv
     enabled cdef_singlepass && enable_feature cdef
+    enabled new_multisymbol && enable_feature restrict_compressed_hdr
 
     if ! enabled delta_q && enabled ext_delta_q; then
       log_echo "ext_delta_q requires delta_q, so disabling ext_delta_q"