libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_ratectrl.h

Index: source/libvpx/vp9/encoder/vp9_ratectrl.h
===================================================================
--- source/libvpx/vp9/encoder/vp9_ratectrl.h	(revision 254565)
+++ source/libvpx/vp9/encoder/vp9_ratectrl.h	(working copy)
@@ -34,17 +34,17 @@
   double key_frame_rate_correction_factor;
   double gf_rate_correction_factor;
 
-  unsigned int frames_since_golden;
-  unsigned int frames_till_gf_update_due;  // Count down till next GF
-  unsigned int max_gf_interval;
-  unsigned int baseline_gf_interval;
-  unsigned int frames_to_key;
-  unsigned int frames_since_key;
-  unsigned int this_key_frame_forced;
-  unsigned int next_key_frame_forced;
-  unsigned int source_alt_ref_pending;
-  unsigned int source_alt_ref_active;
-  unsigned int is_src_frame_alt_ref;
+  int frames_since_golden;
+  int frames_till_gf_update_due;
+  int max_gf_interval;
+  int baseline_gf_interval;
+  int frames_to_key;
+  int frames_since_key;
+  int this_key_frame_forced;
+  int next_key_frame_forced;
+  int source_alt_ref_pending;
+  int source_alt_ref_active;
+  int is_src_frame_alt_ref;
 
   int av_per_frame_bandwidth;     // Average frame size target for clip
   int min_frame_bandwidth;        // Minimum allocation used for any frame
@@ -57,8 +57,8 @@
   double tot_q;
   double avg_q;
 
-  int buffer_level;
-  int bits_off_target;
+  int64_t buffer_level;
+  int64_t bits_off_target;
 
   int decimation_factor;
   int decimation_count;