Add a virtual beamforming audio device on ChromeOS.

media/audio/point.h

Index: media/audio/point.h
diff --git a/media/audio/point.h b/media/audio/point.h
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+// Copyright 2015 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 MEDIA_AUDIO_POINT_H_
+#define MEDIA_AUDIO_POINT_H_
+
+#include <cmath>
+#include <string>
+#include <vector>
+
+#include "media/base/media_export.h"
+#include "ui/gfx/geometry/point3_f.h"
+
+namespace media {
+
+using Point = gfx::Point3F;
+
+// Returns a vector of points parsed from a whitespace-separated string
+// formatted as: "x1 y1 z1 ... zn yn zn" for n points.
+//
+// Returns an empty vector if |points_string| is empty or isn't parseable.
+MEDIA_EXPORT std::vector<Point> ParsePointsFromString(
+    const std::string& points_string);
+
+// Returns |points| as a human-readable string. (Not necessarily in the format
+// required by ParsePointsFromString).
+MEDIA_EXPORT std::string PointsToString(const std::vector<Point>& points);
+
+}  // namespace media
+
+#endif  // MEDIA_AUDIO_POINT_H_