Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vp9/common/vp9_scan.h

Index: third_party/libvpx/source/libvpx/vp9/common/vp9_scan.h
diff --git a/third_party/libvpx/source/libvpx/vp9/common/vp9_scan.h b/third_party/libvpx/source/libvpx/vp9/common/vp9_scan.h
new file mode 100644
index 0000000000000000000000000000000000000000..65e2aa69a54ec8671983fa97801b67c0830a3c42
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vp9/common/vp9_scan.h
@@ -0,0 +1,45 @@
+/*
+ *  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_SCAN_H_
+#define VP9_COMMON_VP9_SCAN_H_
+
+#include "vpx/vpx_integer.h"
+#include "vpx_ports/mem.h"
+
+#include "vp9/common/vp9_enums.h"
+#include "vp9/common/vp9_blockd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MAX_NEIGHBORS 2
+
+typedef struct {
+  const int16_t *scan;
+  const int16_t *iscan;
+  const int16_t *neighbors;
+} scan_order;
+
+extern const scan_order vp9_default_scan_orders[TX_SIZES];
+extern const scan_order vp9_scan_orders[TX_SIZES][TX_TYPES];
+
+static INLINE int get_coef_context(const int16_t *neighbors,
+                                   const uint8_t *token_cache, int c) {
+  return (1 + token_cache[neighbors[MAX_NEIGHBORS * c + 0]] +
+          token_cache[neighbors[MAX_NEIGHBORS * c + 1]]) >> 1;
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VP9_COMMON_VP9_SCAN_H_