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 6ce4a67cdd154e74194d9c078d326ed216849383..2b0da103ffe71c96062febdfdafd5c04d836c2b1 100644
--- a/source/libvpx/vp9/encoder/vp9_encoder.h
+++ b/source/libvpx/vp9/encoder/vp9_encoder.h
@@ -306,6 +306,7 @@ typedef struct VP9_COMP {
   YV12_BUFFER_CONFIG scaled_last_source;
 
   TileDataEnc *tile_data;
+  int allocated_tiles;  // Keep track of memory allocated for tiles.
 
   // For a still frame, this flag is set to 1 to skip partition search.
   int partition_search_skippable_frame;
@@ -478,6 +479,12 @@ typedef struct VP9_COMP {
 #endif
 
   int resize_pending;
+  int resize_state;
+  int resize_scale_num;
+  int resize_scale_den;
+  int resize_avg_qp;
+  int resize_buffer_underflow;
+  int resize_count;
 
   // VAR_BASED_PARTITION thresholds
   // 0 - threshold_64x64; 1 - threshold_32x32;