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diff --git a/chromium/third_party/webrtc/modules/audio_coding/neteq/normal.h b/chromium/third_party/webrtc/modules/audio_coding/neteq/normal.h
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+++ b/chromium/third_party/webrtc/modules/audio_coding/neteq/normal.h
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+/*
+ *  Copyright (c) 2012 The WebRTC 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 WEBRTC_MODULES_AUDIO_CODING_NETEQ_NORMAL_H_
+#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_NORMAL_H_
+
+#include <string.h>  // Access to size_t.
+
+#include <vector>
+
+#include "webrtc/base/constructormagic.h"
+#include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h"
+#include "webrtc/modules/audio_coding/neteq/defines.h"
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+
+// Forward declarations.
+class BackgroundNoise;
+class DecoderDatabase;
+class Expand;
+
+// This class provides the "Normal" DSP operation, that is performed when
+// there is no data loss, no need to stretch the timing of the signal, and
+// no other "special circumstances" are at hand.
+class Normal {
+ public:
+  Normal(int fs_hz, DecoderDatabase* decoder_database,
+         const BackgroundNoise& background_noise,
+         Expand* expand)
+      : fs_hz_(fs_hz),
+        decoder_database_(decoder_database),
+        background_noise_(background_noise),
+        expand_(expand) {
+  }
+
+  virtual ~Normal() {}
+
+  // Performs the "Normal" operation. The decoder data is supplied in |input|,
+  // having |length| samples in total for all channels (interleaved). The
+  // result is written to |output|. The number of channels allocated in
+  // |output| defines the number of channels that will be used when
+  // de-interleaving |input|. |last_mode| contains the mode used in the previous
+  // GetAudio call (i.e., not the current one), and |external_mute_factor| is
+  // a pointer to the mute factor in the NetEqImpl class.
+  int Process(const int16_t* input, size_t length,
+              Modes last_mode,
+              int16_t* external_mute_factor_array,
+              AudioMultiVector* output);
+
+ private:
+  int fs_hz_;
+  DecoderDatabase* decoder_database_;
+  const BackgroundNoise& background_noise_;
+  Expand* expand_;
+
+  DISALLOW_COPY_AND_ASSIGN(Normal);
+};
+
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_NORMAL_H_