diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/common/vp9_convolve.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/libvpx/vp9/common/vp9_convolve.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+/*
+ *  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 VP9_COMMON_VP9_CONVOLVE_H_
+#define VP9_COMMON_VP9_CONVOLVE_H_
+
+#include "./vpx_config.h"
+#include "vpx/vpx_integer.h"
+
+typedef void (*convolve_fn_t)(const uint8_t *src, ptrdiff_t src_stride,
+                              uint8_t *dst, ptrdiff_t dst_stride,
+                              const int16_t *filter_x, int x_step_q4,
+                              const int16_t *filter_y, int y_step_q4,
+                              int w, int h);
+
+#endif  // VP9_COMMON_VP9_CONVOLVE_H_