Caching AudioOutputDevice instances in mixer manager

media/base/fake_audio_renderer_sink.cc

Index: media/base/fake_audio_renderer_sink.cc
diff --git a/media/base/fake_audio_renderer_sink.cc b/media/base/fake_audio_renderer_sink.cc
index 40c3cdf9c270e8de6c0796700342da302d2f0069..be071c49e2749460010cd9e29c9b3849860166ac 100644
--- a/media/base/fake_audio_renderer_sink.cc
+++ b/media/base/fake_audio_renderer_sink.cc
@@ -11,17 +11,21 @@
 namespace media {
 
 FakeAudioRendererSink::FakeAudioRendererSink()
-    : state_(kUninitialized),
-      callback_(NULL),
-      output_device_info_(
-          std::string(),
-          OUTPUT_DEVICE_STATUS_OK,
+    : FakeAudioRendererSink(
           media::AudioParameters(media::AudioParameters::AUDIO_FAKE,
                                  media::CHANNEL_LAYOUT_STEREO,
                                  media::AudioParameters::kTelephoneSampleRate,
                                  16,
                                  1)) {}
 
+FakeAudioRendererSink::FakeAudioRendererSink(
+    const AudioParameters& hardware_params)
+    : state_(kUninitialized),
+      callback_(nullptr),
+      output_device_info_(std::string(),
+                          OUTPUT_DEVICE_STATUS_OK,
+                          hardware_params) {}
+
 FakeAudioRendererSink::~FakeAudioRendererSink() {
   DCHECK(!callback_);
 }