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diff --git a/chromium/third_party/webrtc/modules/audio_coding/neteq/delay_peak_detector.h b/chromium/third_party/webrtc/modules/audio_coding/neteq/delay_peak_detector.h
new file mode 100644
index 00000000000..8bf6aba8b55
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+++ b/chromium/third_party/webrtc/modules/audio_coding/neteq/delay_peak_detector.h
@@ -0,0 +1,76 @@
+/*
+ *  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_DELAY_PEAK_DETECTOR_H_
+#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_DELAY_PEAK_DETECTOR_H_
+
+#include <string.h>  // size_t
+
+#include <list>
+
+#include "webrtc/base/constructormagic.h"
+
+namespace webrtc {
+
+class DelayPeakDetector {
+ public:
+  DelayPeakDetector();
+  virtual ~DelayPeakDetector() {}
+  virtual void Reset();
+
+  // Notifies the DelayPeakDetector of how much audio data is carried in each
+  // packet.
+  virtual void SetPacketAudioLength(int length_ms);
+
+  // Returns true if peak-mode is active. That is, delay peaks were observed
+  // recently.
+  virtual bool peak_found() { return peak_found_; }
+
+  // Calculates and returns the maximum delay peak height. Returns -1 if no
+  // delay peaks have been observed recently. The unit is number of packets.
+  virtual int MaxPeakHeight() const;
+
+  // Calculates and returns the maximum delay peak distance in ms.
+  // Returns -1 if no delay peaks have been observed recently.
+  virtual int MaxPeakPeriod() const;
+
+  // Updates the DelayPeakDetector with a new inter-arrival time (in packets)
+  // and the current target buffer level (needed to decide if a peak is observed
+  // or not). Returns true if peak-mode is active, false if not.
+  virtual bool Update(int inter_arrival_time, int target_level);
+
+  // Increments the |peak_period_counter_ms_| with |inc_ms|. Only increments
+  // the counter if it is non-negative. A negative denotes that no peak has
+  // been observed.
+  virtual void IncrementCounter(int inc_ms);
+
+ private:
+  static const size_t kMaxNumPeaks = 8;
+  static const size_t kMinPeaksToTrigger = 2;
+  static const int kPeakHeightMs = 78;
+  static const int kMaxPeakPeriodMs = 10000;
+
+  typedef struct {
+    int period_ms;
+    int peak_height_packets;
+  } Peak;
+
+  bool CheckPeakConditions();
+
+  std::list<Peak> peak_history_;
+  bool peak_found_;
+  int peak_detection_threshold_;
+  int peak_period_counter_ms_;
+
+  DISALLOW_COPY_AND_ASSIGN(DelayPeakDetector);
+};
+
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_DELAY_PEAK_DETECTOR_H_