Remove CommandLine dependency from the Linux's AudioCapturer.

remoting/host/desktop_environment.cc

Index: remoting/host/desktop_environment.cc
diff --git a/remoting/host/desktop_environment.cc b/remoting/host/desktop_environment.cc
index 12d3655af4f794de1f706c579feb0c9977f5909e..8b2ac4b76cba67a0ecec5c98d578c7b80a6434f5 100644
--- a/remoting/host/desktop_environment.cc
+++ b/remoting/host/desktop_environment.cc
@@ -23,7 +23,7 @@ scoped_ptr<DesktopEnvironment> DesktopEnvironment::Create(
   scoped_ptr<VideoFrameCapturer> capturer(VideoFrameCapturer::Create());
   scoped_ptr<EventExecutor> event_executor = EventExecutor::Create(
       context->desktop_task_runner(), context->ui_task_runner());
-  scoped_ptr<AudioCapturer> audio_capturer = AudioCapturer::Create();
+  scoped_ptr<AudioCapturer> audio_capturer = AudioCapturer::Create(context);
 
   if (capturer.get() == NULL || event_executor.get() == NULL) {
     LOG(ERROR) << "Unable to create DesktopEnvironment";
@@ -43,7 +43,7 @@ scoped_ptr<DesktopEnvironment> DesktopEnvironment::CreateForService(
   scoped_ptr<VideoFrameCapturer> capturer(VideoFrameCapturer::Create());
   scoped_ptr<EventExecutor> event_executor = EventExecutor::Create(
       context->desktop_task_runner(), context->ui_task_runner());
-  scoped_ptr<AudioCapturer> audio_capturer = AudioCapturer::Create();
+  scoped_ptr<AudioCapturer> audio_capturer = AudioCapturer::Create(context);
 
   if (capturer.get() == NULL || event_executor.get() == NULL) {
     LOG(ERROR) << "Unable to create DesktopEnvironment";