Fix latency plumbing in media::VirtualAudio[Input|Output]Stream.

media/audio/virtual_audio_input_stream.cc

Index: media/audio/virtual_audio_input_stream.cc
diff --git a/media/audio/virtual_audio_input_stream.cc b/media/audio/virtual_audio_input_stream.cc
index a961b53493b7ddc2c3291ce91f54b1d20cab6f96..30eeeeef27da7abc0420ec36f9227c46de4d618f 100644
--- a/media/audio/virtual_audio_input_stream.cc
+++ b/media/audio/virtual_audio_input_stream.cc
@@ -38,7 +38,7 @@ class LoopbackAudioConverter : public AudioConverter::InputCallback {
  private:
   double ProvideInput(AudioBus* audio_bus,
                       base::TimeDelta buffer_delay) override {
-    audio_converter_.Convert(audio_bus);
+    audio_converter_.ConvertWithDelay(buffer_delay, audio_bus);
     return 1.0;
   }
 
@@ -137,9 +137,13 @@ void VirtualAudioInputStream::PumpAudio(AudioBus* audio_bus) {
 
   {
     base::AutoLock scoped_lock(converter_network_lock_);
-    mixer_.Convert(audio_bus);
+    // Because the audio is being looped-back, the delay until it will be played
+    // out is zero.
+    mixer_.ConvertWithDelay(base::TimeDelta(), audio_bus);
   }
-  callback_->OnData(this, audio_bus, params_.GetBytesPerBuffer(), 1.0);
+  // Because the audio is being looped-back, the delay since since it was
+  // recorded is zero.
+  callback_->OnData(this, audio_bus, 0, 1.0);
 }
 
 void VirtualAudioInputStream::Close() {