Add AudioManager::GetAudioOutputDeviceNames and implement for pulseaudio.

media/audio/audio_manager_unittest.cc

+// Copyright 2013 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.
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "media/audio/audio_manager.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(USE_PULSEAUDIO)
+#include "media/audio/pulse/audio_manager_pulse.h"
+#endif
+
+namespace media {
+
+// TODO(joi): Remove guards once implemented for all platforms.
+TEST(AudioManagerTest, GetAudioOutputDeviceNames) {
+#if defined(USE_PULSEAUDIO)
+  scoped_ptr<AudioManager> audio_manager_pulse(AudioManagerPulse::Create());
+  if (!audio_manager_pulse)
+    return;
+
+  AudioDeviceNames device_names;
+  audio_manager_pulse->GetAudioOutputDeviceNames(&device_names);
+
+  VLOG(2) << "Got " << device_names.size() << " audio output devices.";
+  for (AudioDeviceNames::iterator it = device_names.begin();
+       it != device_names.end();
+       ++it) {
+    EXPECT_FALSE(it->unique_id.empty());
+    EXPECT_FALSE(it->device_name.empty());
+    VLOG(2) << "Device ID(" << it->unique_id << "), label: " << it->device_name;
+  }
+#endif  // defined(USE_PULSEAUDIO)
+}
+
+}  // namespace media