libvpx: Pull from upstream

source/libvpx/webmdec.h

 /*
  *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #ifndef WEBMDEC_H_
@@ skipping 10 matching lines @@
 struct WebmInputContext {
   void *reader;
   void *segment;
   uint8_t *buffer;
   const void *cluster;
   const void *block_entry;
   const void *block;
   int block_frame_index;
   int video_track_index;
   uint64_t timestamp_ns;
+  int is_key_frame;
 };
 
 // Checks if the input is a WebM file. If so, initializes WebMInputContext so
 // that webm_read_frame can be called to retrieve a video frame.
 // Returns 1 on success and 0 on failure or input is not WebM file.
 // TODO(vigneshv): Refactor this function into two smaller functions specific
 // to their task.
 int file_is_webm(struct WebmInputContext *webm_ctx,
                  struct VpxInputContext *vpx_ctx);
 
@@ skipping 22 matching lines @@
                          struct VpxInputContext *vpx_ctx);
 
 // Resets the WebMInputContext.
 void webm_free(struct WebmInputContext *webm_ctx);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // WEBMDEC_H_