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diff --git a/media/libaom/src/third_party/libwebm/common/hdr_util.h b/media/libaom/src/third_party/libwebm/common/hdr_util.h
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+++ b/media/libaom/src/third_party/libwebm/common/hdr_util.h
@@ -0,0 +1,71 @@
+// Copyright (c) 2016 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 LIBWEBM_COMMON_HDR_UTIL_H_
+#define LIBWEBM_COMMON_HDR_UTIL_H_
+
+#include <stdint.h>
+
+#include <memory>
+
+#include "mkvmuxer/mkvmuxer.h"
+
+namespace mkvparser {
+struct Colour;
+struct MasteringMetadata;
+struct PrimaryChromaticity;
+}  // namespace mkvparser
+
+namespace libwebm {
+// Utility types and functions for working with the Colour element and its
+// children. Copiers return true upon success. Presence functions return true
+// when the specified element is present.
+
+// TODO(tomfinegan): These should be moved to libwebm_utils once c++11 is
+// required by libwebm.
+
+// Features of the VP9 codec that may be set in the CodecPrivate of a VP9 video
+// stream. A value of kValueNotPresent represents that the value was not set in
+// the CodecPrivate.
+struct Vp9CodecFeatures {
+  static const int kValueNotPresent;
+
+  Vp9CodecFeatures()
+      : profile(kValueNotPresent),
+        level(kValueNotPresent),
+        bit_depth(kValueNotPresent),
+        chroma_subsampling(kValueNotPresent) {}
+  ~Vp9CodecFeatures() {}
+
+  int profile;
+  int level;
+  int bit_depth;
+  int chroma_subsampling;
+};
+
+typedef std::unique_ptr<mkvmuxer::PrimaryChromaticity> PrimaryChromaticityPtr;
+
+bool CopyPrimaryChromaticity(const mkvparser::PrimaryChromaticity& parser_pc,
+                             PrimaryChromaticityPtr* muxer_pc);
+
+bool MasteringMetadataValuePresent(double value);
+
+bool CopyMasteringMetadata(const mkvparser::MasteringMetadata& parser_mm,
+                           mkvmuxer::MasteringMetadata* muxer_mm);
+
+bool ColourValuePresent(long long value);
+
+bool CopyColour(const mkvparser::Colour& parser_colour,
+                mkvmuxer::Colour* muxer_colour);
+
+// Returns true if |features| is set to one or more valid values.
+bool ParseVpxCodecPrivate(const uint8_t* private_data, int32_t length,
+                          Vp9CodecFeatures* features);
+
+}  // namespace libwebm
+
+#endif  // LIBWEBM_COMMON_HDR_UTIL_H_