libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_lookahead.h

 /*
  *  Copyright (c) 2011 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 VP9_ENCODER_VP9_LOOKAHEAD_H_
 #define VP9_ENCODER_VP9_LOOKAHEAD_H_
+
 #include "vpx_scale/yv12config.h"
 #include "vpx/vpx_integer.h"
 
 struct lookahead_entry {
   YV12_BUFFER_CONFIG  img;
   int64_t             ts_start;
   int64_t             ts_end;
   unsigned int        flags;
 };
 
@@ skipping 72 matching lines @@
                    int                   index);
 
 
 /**\brief Get the number of frames currently in the lookahead queue
  *
  * \param[in] ctx       Pointer to the lookahead context
  */
 unsigned int
 vp9_lookahead_depth(struct lookahead_ctx *ctx);
 
-
-#endif
+#endif  // VP9_ENCODER_VP9_LOOKAHEAD_H_