Add AudioManager::GetAudioOutputDeviceNames and implement for pulseaudio.

media/media.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Override to dynamically link the cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 895 matching lines @@
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../ui/ui.gyp:ui',
       ],
       'sources': [
         'audio/audio_input_controller_unittest.cc',
         'audio/audio_input_device_unittest.cc',
         'audio/audio_input_unittest.cc',
         'audio/audio_input_volume_unittest.cc',
         'audio/audio_low_latency_input_output_unittest.cc',
+        'audio/audio_manager_unittest.cc',
         'audio/audio_output_controller_unittest.cc',
         'audio/audio_output_device_unittest.cc',
         'audio/audio_output_proxy_unittest.cc',
         'audio/audio_parameters_unittest.cc',
         'audio/audio_power_monitor_unittest.cc',
         'audio/fake_audio_consumer_unittest.cc',
         'audio/ios/audio_manager_ios_unittest.cc',
         'audio/linux/alsa_output_unittest.cc',
         'audio/mac/audio_auhal_mac_unittest.cc',
         'audio/mac/audio_device_listener_mac_unittest.cc',
@@ skipping 171 matching lines @@
               ],
             }],
           ],
         }],
         ['use_alsa==0', {
           'sources!': [
             'audio/linux/alsa_output_unittest.cc',
             'audio/audio_low_latency_input_output_unittest.cc',
           ],
         }],
+        ['use_pulseaudio==1', {
+          'defines': [
+            'USE_PULSEAUDIO',
+          ],
+        }],
         ['OS!="ios" and (target_arch=="ia32" or target_arch=="x64")', {
           'sources': [
             'base/simd/convert_rgb_to_yuv_unittest.cc',
           ],
         }],
         ['proprietary_codecs==1 or branding=="Chrome"', {
           'sources': [
             'mp4/aac_unittest.cc',
             'mp4/avc_unittest.cc',
             'mp4/box_reader_unittest.cc',
@@ skipping 464 matching lines @@
                   ],
                 }],
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }