Adding WebRTC Auto Gain Control Test (linux)

chrome/browser/media/webrtc_browsertest_audio.h

Index: chrome/browser/media/webrtc_browsertest_audio.h
diff --git a/chrome/browser/media/webrtc_browsertest_audio.h b/chrome/browser/media/webrtc_browsertest_audio.h
new file mode 100644
index 0000000000000000000000000000000000000000..25b717007996a2bb509da7be832dc54d84c5af73
--- /dev/null
+++ b/chrome/browser/media/webrtc_browsertest_audio.h
@@ -0,0 +1,26 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_AUDIO_H_
+#define CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_AUDIO_H_
+
+#include <vector>
+
+namespace base {
+class FilePath;
+}
+
+namespace test {
+
+// Computes the average power of the audio signal for each 10-millisecond
+// interval in the wav file pointed to by |wav_file_path|.
+//
+// Returns a vector of audio dBFS (decibels relative to full-scale) values.
+// See media/audio/audio_power_monitor.h for more details.
+std::vector<float> ComputeAudioEnergyForWavFile(
+    const base::FilePath& wav_file_path);
+
+}  // namespace test
+
+#endif  // CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_AUDIO_H_