Moving SwitchOutputDevice out of OutputDevice interface, eliminating OutputDevice

media/audio/audio_parameters.cc

Index: media/audio/audio_parameters.cc
diff --git a/media/audio/audio_parameters.cc b/media/audio/audio_parameters.cc
index 10f41d50452261a181849909157d36d179172f36..8f364cffc0ef575455d07e4ea46a0a18a1152c62 100644
--- a/media/audio/audio_parameters.cc
+++ b/media/audio/audio_parameters.cc
@@ -96,4 +96,12 @@ bool AudioParameters::Equals(const AudioParameters& other) const {
          effects_ == other.effects() && mic_positions_ == other.mic_positions_;
 }
 
+// static
+AudioParameters AudioParameters::UnavailableDeviceParams() {
+  return media::AudioParameters(
+      media::AudioParameters::AUDIO_FAKE, media::CHANNEL_LAYOUT_STEREO,
+      media::AudioParameters::kAudioCDSampleRate, 16,
+      media::AudioParameters::kAudioCDSampleRate / 10);
+}
+
 }  // namespace media