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diff --git a/media/libvpx/vp8/common/entropy.h b/media/libvpx/vp8/common/entropy.h
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+/*
+ * Copyright (c) 2010 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 VP8_COMMON_ENTROPY_H_
+#define VP8_COMMON_ENTROPY_H_
+
+#include "treecoder.h"
+#include "blockd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Coefficient token alphabet */
+
+#define ZERO_TOKEN 0 /* 0 Extra Bits 0+0 */
+#define ONE_TOKEN 1 /* 1 Extra Bits 0+1 */
+#define TWO_TOKEN 2 /* 2 Extra Bits 0+1 */
+#define THREE_TOKEN 3 /* 3 Extra Bits 0+1 */
+#define FOUR_TOKEN 4 /* 4 Extra Bits 0+1 */
+#define DCT_VAL_CATEGORY1 5 /* 5-6 Extra Bits 1+1 */
+#define DCT_VAL_CATEGORY2 6 /* 7-10 Extra Bits 2+1 */
+#define DCT_VAL_CATEGORY3 7 /* 11-18 Extra Bits 3+1 */
+#define DCT_VAL_CATEGORY4 8 /* 19-34 Extra Bits 4+1 */
+#define DCT_VAL_CATEGORY5 9 /* 35-66 Extra Bits 5+1 */
+#define DCT_VAL_CATEGORY6 10 /* 67+ Extra Bits 11+1 */
+#define DCT_EOB_TOKEN 11 /* EOB Extra Bits 0+0 */
+
+#define MAX_ENTROPY_TOKENS 12
+#define ENTROPY_NODES 11
+
+extern const vp8_tree_index vp8_coef_tree[];
+
+extern const struct vp8_token_struct vp8_coef_encodings[MAX_ENTROPY_TOKENS];
+
+typedef struct
+{
+ vp8_tree_p tree;
+ const vp8_prob *prob;
+ int Len;
+ int base_val;
+} vp8_extra_bit_struct;
+
+extern const vp8_extra_bit_struct vp8_extra_bits[12]; /* indexed by token value */
+
+#define PROB_UPDATE_BASELINE_COST 7
+
+#define MAX_PROB 255
+#define DCT_MAX_VALUE 2048
+
+
+/* Coefficients are predicted via a 3-dimensional probability table. */
+
+/* Outside dimension. 0 = Y no DC, 1 = Y2, 2 = UV, 3 = Y with DC */
+
+#define BLOCK_TYPES 4
+
+/* Middle dimension is a coarsening of the coefficient's
+ position within the 4x4 DCT. */
+
+#define COEF_BANDS 8
+extern DECLARE_ALIGNED(16, const unsigned char, vp8_coef_bands[16]);
+
+/* Inside dimension is 3-valued measure of nearby complexity, that is,
+ the extent to which nearby coefficients are nonzero. For the first
+ coefficient (DC, unless block type is 0), we look at the (already encoded)
+ blocks above and to the left of the current block. The context index is
+ then the number (0,1,or 2) of these blocks having nonzero coefficients.
+ After decoding a coefficient, the measure is roughly the size of the
+ most recently decoded coefficient (0 for 0, 1 for 1, 2 for >1).
+ Note that the intuitive meaning of this measure changes as coefficients
+ are decoded, e.g., prior to the first token, a zero means that my neighbors
+ are empty while, after the first token, because of the use of end-of-block,
+ a zero means we just decoded a zero and hence guarantees that a non-zero
+ coefficient will appear later in this block. However, this shift
+ in meaning is perfectly OK because our context depends also on the
+ coefficient band (and since zigzag positions 0, 1, and 2 are in
+ distinct bands). */
+
+/*# define DC_TOKEN_CONTEXTS 3*/ /* 00, 0!0, !0!0 */
+# define PREV_COEF_CONTEXTS 3
+
+extern DECLARE_ALIGNED(16, const unsigned char, vp8_prev_token_class[MAX_ENTROPY_TOKENS]);
+
+extern const vp8_prob vp8_coef_update_probs [BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES];
+
+
+struct VP8Common;
+void vp8_default_coef_probs(struct VP8Common *);
+
+extern DECLARE_ALIGNED(16, const int, vp8_default_zig_zag1d[16]);
+extern DECLARE_ALIGNED(16, const short, vp8_default_inv_zig_zag[16]);
+extern DECLARE_ALIGNED(16, const short, vp8_default_zig_zag_mask[16]);
+extern const int vp8_mb_feature_data_bits[MB_LVL_MAX];
+
+void vp8_coef_tree_initialize(void);
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // VP8_COMMON_ENTROPY_H_