Removing unused alt_activity_measure() function.

Change-Id: I6b520553cb5334b44356dc4651a2dbc1cb93cca5

vp9/encoder/vp9_encodeframe.c

@@ -560,11 +560,6 @@ static unsigned int tt_activity_measure(MACROBLOCK *x) {
   return act < (8 << 12) ? MIN(act, 5 << 12) : act;
 }
 
-// Stub for alternative experimental activity measures.
-static unsigned int alt_activity_measure(MACROBLOCK *x, int use_dc_pred) {
-  return vp9_encode_intra(x, use_dc_pred);
-}
-
 static void update_state(VP9_COMP *cpi, PICK_MODE_CONTEXT *ctx,
                          int mi_row, int mi_col, BLOCK_SIZE bsize,
                          int output_enabled) {

vp9/encoder/vp9_encodemb.c

@@ -601,15 +601,3 @@ void vp9_encode_intra_block_plane(MACROBLOCK *x, BLOCK_SIZE bsize, int plane) {
   vp9_foreach_transformed_block_in_plane(xd, bsize, plane, encode_block_intra,
                                          &arg);
 }
-
-int vp9_encode_intra(MACROBLOCK *x, int use_16x16_pred) {
-  MB_MODE_INFO * mbmi = &x->e_mbd.mi[0]->mbmi;
-  x->skip_encode = 0;
-  mbmi->mode = DC_PRED;
-  mbmi->ref_frame[0] = INTRA_FRAME;
-  mbmi->tx_size = use_16x16_pred ? (mbmi->sb_type >= BLOCK_16X16 ? TX_16X16
-                                                                 : TX_8X8)
-                                   : TX_4X4;
-  vp9_encode_intra_block_plane(x, mbmi->sb_type, 0);
-  return vp9_get_mb_ss(x->plane[0].src_diff);
-}

vp9/encoder/vp9_encodemb.h

@@ -34,8 +34,6 @@ void vp9_encode_block_intra(MACROBLOCK *x, int plane, int block,
 
 void vp9_encode_intra_block_plane(MACROBLOCK *x, BLOCK_SIZE bsize, int plane);
 
-int vp9_encode_intra(MACROBLOCK *x, int use_16x16_pred);
-
 #ifdef __cplusplus
 }  // extern "C"
 #endif

vp9/encoder/vp9_firstpass.c

@@ -604,7 +604,13 @@ void vp9_first_pass(VP9_COMP *cpi) {
       }
 
       // Do intra 16x16 prediction.
-      this_error = vp9_encode_intra(x, use_dc_pred);
+      x->skip_encode = 0;
+      xd->mi[0]->mbmi.mode = DC_PRED;
+      xd->mi[0]->mbmi.tx_size = use_dc_pred ?
+         (bsize >= BLOCK_16X16 ? TX_16X16 : TX_8X8) : TX_4X4;
+      vp9_encode_intra_block_plane(x, bsize, 0);
+      this_error = vp9_get_mb_ss(x->plane[0].src_diff);
+
       if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
         vp9_clear_system_state();
         this_error = (int)(this_error * error_weight);