pass2_strategy: make av1_accumulate_next_frame_stats static

The last reference to the function outside of this module was removed
in:
f1b816dacf Remove qmode code

Bug: aomedia:3416
Change-Id: I26644a470957c477d5183f3954e31c0ffede1dff
diff --git a/av1/encoder/pass2_strategy.c b/av1/encoder/pass2_strategy.c
index 4539be7..bf96011 100644
--- a/av1/encoder/pass2_strategy.c
+++ b/av1/encoder/pass2_strategy.c
@@ -514,12 +514,12 @@
   gf_stats->gf_group_inactive_zone_rows += stats->inactive_zone_rows;
 }
 
-void av1_accumulate_next_frame_stats(const FIRSTPASS_STATS *stats,
-                                     const int flash_detected,
-                                     const int frames_since_key,
-                                     const int cur_idx,
-                                     GF_GROUP_STATS *gf_stats, int f_w,
-                                     int f_h) {
+static void accumulate_next_frame_stats(const FIRSTPASS_STATS *stats,
+                                        const int flash_detected,
+                                        const int frames_since_key,
+                                        const int cur_idx,
+                                        GF_GROUP_STATS *gf_stats, int f_w,
+                                        int f_h) {
   accumulate_frame_motion_stats(stats, gf_stats, f_w, f_h);
   // sum up the metric values of current gf group
   gf_stats->avg_sr_coded_error += stats->sr_coded_error;
@@ -1939,9 +1939,8 @@
       flash_detected = detect_flash(twopass, &cpi->twopass_frame, 0);
       // TODO(bohanli): remove redundant accumulations here, or unify
       // this and the ones in define_gf_group
-      av1_accumulate_next_frame_stats(&next_frame, flash_detected,
-                                      rc->frames_since_key, i, &gf_stats, f_w,
-                                      f_h);
+      accumulate_next_frame_stats(&next_frame, flash_detected,
+                                  rc->frames_since_key, i, &gf_stats, f_w, f_h);
 
       cut_here = detect_gf_cut(cpi, i, cur_start, flash_detected,
                                active_max_gf_interval, active_min_gf_interval,
@@ -2279,9 +2278,8 @@
     flash_detected = detect_flash(twopass, &cpi->twopass_frame, 0);
 
     // accumulate stats for next frame
-    av1_accumulate_next_frame_stats(next_frame, flash_detected,
-                                    rc->frames_since_key, i, gf_stats, f_w,
-                                    f_h);
+    accumulate_next_frame_stats(next_frame, flash_detected,
+                                rc->frames_since_key, i, gf_stats, f_w, f_h);
 
     ++i;
   }
diff --git a/av1/encoder/pass2_strategy.h b/av1/encoder/pass2_strategy.h
index a75be1a..e34454e 100644
--- a/av1/encoder/pass2_strategy.h
+++ b/av1/encoder/pass2_strategy.h
@@ -134,12 +134,6 @@
                        int *num_fpstats_used, int *num_fpstats_required,
                        int project_gfu_boost);
 
-void av1_accumulate_next_frame_stats(const FIRSTPASS_STATS *stats,
-                                     const int flash_detected,
-                                     const int frames_since_key,
-                                     const int cur_idx,
-                                     GF_GROUP_STATS *gf_stats, int f_w,
-                                     int f_h);
 // Identify stable and unstable regions from first pass stats.
 // stats_start points to the first frame to analyze.
 // |offset| is the offset from the current frame to the frame stats_start is