Implement HasInputDevices in CrasAudioManager

media/audio/cras/audio_manager_cras.cc

Index: media/audio/cras/audio_manager_cras.cc
diff --git a/media/audio/cras/audio_manager_cras.cc b/media/audio/cras/audio_manager_cras.cc
index befd3df6dfc9911a9e75c89d87faaa6b3a2c31ba..6c7646ed7b28e1d3487d373f2664b53eac780b55 100644
--- a/media/audio/cras/audio_manager_cras.cc
+++ b/media/audio/cras/audio_manager_cras.cc
@@ -49,12 +49,13 @@ bool AudioManagerCras::HasAudioOutputDevices() {
 }
 
 bool AudioManagerCras::HasAudioInputDevices() {
-  return true;
+  return has_input_devices_;
 }
 
 AudioManagerCras::AudioManagerCras(AudioLogFactory* audio_log_factory)
     : AudioManagerBase(audio_log_factory),
-      has_keyboard_mic_(false) {
+      has_keyboard_mic_(false),
+      has_input_devices_(false) {
   SetMaxOutputStreamsAllowed(kMaxOutputStreams);
 }
 
@@ -99,6 +100,11 @@ void AudioManagerCras::SetHasKeyboardMic() {
   has_keyboard_mic_ = true;
 }
 
+void AudioManagerCras::SetHasInputDevices(bool has_input_devices) {
+  DCHECK(GetTaskRunner()->BelongsToCurrentThread());
+  has_input_devices_ = has_input_devices;
+}
+
 AudioOutputStream* AudioManagerCras::MakeLinearOutputStream(
     const AudioParameters& params) {
   DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());