Add the copresence DirectiveHandler.

components/copresence/test/audio_test_support.h

+// 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 COMPONENTS_COPRESENCE_COMMON_AUDIO_TEST_SUPPORT_
+#define COMPONENTS_COPRESENCE_COMMON_AUDIO_TEST_SUPPORT_
+
+#include <cstddef>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace media {
+class AudioBus;
+class AudioBusRefCounted;
+}
+
+namespace copresence {
+
+// Populate random samples given a random seed into the samples array.
+void PopulateSamples(int random_seed, size_t size, float* samples);
+
+// Create an audio bus populated with random samples.
+scoped_ptr<media::AudioBus> CreateRandomAudio(int channels, int samples);
+
+// Create an ref counted audio bus populated with random samples.
+scoped_refptr<media::AudioBusRefCounted> CreateRandomAudioRefCounted(
+    int channels,
+    int samples);
+
+}  // namespace copresence
+
+#endif  // COMPONENTS_COPRESENCE_COMMON_AUDIO_TEST_SUPPORT_