libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_encoder.h

Index: source/libvpx/vp9/encoder/vp9_encoder.h
diff --git a/source/libvpx/vp9/encoder/vp9_encoder.h b/source/libvpx/vp9/encoder/vp9_encoder.h
index c3679ca0b8e3f1e48eb5884c944373e6d68b799f..914080c6f2ac2b0e9cd7675c589b79636d3e4f34 100644
--- a/source/libvpx/vp9/encoder/vp9_encoder.h
+++ b/source/libvpx/vp9/encoder/vp9_encoder.h
@@ -266,6 +266,12 @@ typedef struct ThreadData {
 
 struct EncWorkerData;
 
+typedef struct ActiveMap {
+  int enabled;
+  int update;
+  unsigned char *map;
+} ActiveMap;
+
 typedef struct VP9_COMP {
   QUANTS quants;
   ThreadData td;
@@ -358,6 +364,7 @@ typedef struct VP9_COMP {
   int  segment_encode_breakout[MAX_SEGMENTS];
 
   CYCLIC_REFRESH *cyclic_refresh;
+  ActiveMap active_map;
 
   fractional_mv_step_fp *find_fractional_mv_step;
   vp9_full_search_fn_t full_search_sad;