Enable pulse as the default IO handling in Chrome

media/audio/linux/audio_manager_linux.cc

 // 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.
 
 #include "media/audio/linux/audio_manager_linux.h"
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/logging.h"
 #include "base/nix/xdg_util.h"
 #include "base/process_util.h"
 #include "base/stl_util.h"
 #include "media/audio/audio_output_dispatcher.h"
 #include "media/audio/audio_parameters.h"
 #include "media/audio/audio_util.h"
 #if defined(USE_CRAS)
 #include "media/audio/cras/audio_manager_cras.h"
 #endif
 #include "media/audio/linux/alsa_input.h"
 #include "media/audio/linux/alsa_output.h"
 #include "media/audio/linux/alsa_wrapper.h"
-#if defined(USE_PULSEAUDIO)
 #include "media/audio/pulse/audio_manager_pulse.h"
-#endif
 #include "media/base/channel_layout.h"
 #include "media/base/limits.h"
 #include "media/base/media_switches.h"
 
 namespace media {
 
 // Maximum number of output streams that can be open simultaneously.
 static const int kMaxOutputStreams = 50;
 
 // Default sample rate for input and output streams.
@@ skipping 283 matching lines @@
   return new AlsaPcmInputStream(this, device_name, params, wrapper_.get());
 }
 
 AudioManager* CreateAudioManager() {
 #if defined(USE_CRAS)
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUseCras)) {
     return new AudioManagerCras();
   }
 #endif
 
-#if defined(USE_PULSEAUDIO)
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUsePulseAudio)) {
-    AudioManager* manager = AudioManagerPulse::Create();
-    if (manager)
-      return manager;
-  }
-#endif
+  AudioManager* manager = AudioManagerPulse::Create();

[DaleCurtis, 2013/03/11 22:06:46]

fischman had a great suggestion: You should add a UMA stat for how often this
route is taken so we know our relative percentage of pulse users.

[no longer working on chromium, 2013/03/12 16:08:29]

Done.

+  if (manager)
+    return manager;
 
   return new AudioManagerLinux();
 }
 
 }  // namespace media