Remove Frame_ID_NUMBERS_PRESENT_FLAG

This commit replaces hard coded FRAME_ID_NUMBERS_PRESENT_FLAG with
error_resilient_mode, which properly reflects the intention of the
experiment, i.e. "signal the complete state of the reference buffer
explicitly for each frame" to deal with possible frame losses.

Change-Id: I7130c110d26c6a8e1cf1266c05482b768cf352f9

av1/common/onyxc_int.h

@@ -66,7 +66,6 @@ extern "C" {
 
 #if CONFIG_REFERENCE_BUFFER
 /* Constant values while waiting for the sequence header */
-#define FRAME_ID_NUMBERS_PRESENT_FLAG 1
 #define FRAME_ID_LENGTH 15
 #define DELTA_FRAME_ID_LENGTH 14
 #endif  // CONFIG_REFERENCE_BUFFER

av1/encoder/bitstream.c

@@ -3316,7 +3316,7 @@ void write_sequence_header(AV1_COMP *cpi, struct aom_write_bit_buffer *wb) {
 #if CONFIG_EXT_TILE
       cm->large_scale_tile ? 0 :
 #endif  // CONFIG_EXT_TILE
-                           FRAME_ID_NUMBERS_PRESENT_FLAG;
+                           cm->error_resilient_mode;
   seq_params->frame_id_length = FRAME_ID_LENGTH;
   seq_params->delta_frame_id_length = DELTA_FRAME_ID_LENGTH;