AudioConverter: Express delay in frames rather than msec.

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 07855c977a9dc7faf9f770d9fc26ee69ba8ab142..ef9799668f8a5ce31865fe8351bfdb6bc37f4ea5 100644
--- a/media/audio/virtual_audio_input_stream.cc
+++ b/media/audio/virtual_audio_input_stream.cc
@@ -105,7 +105,7 @@ void VirtualAudioInputStream::PumpAudio() {
     base::AutoLock scoped_lock(converter_network_lock_);
     // Because the audio is being looped-back, the delay until it will be played
     // out is zero.
-    mixer_.ConvertWithDelay(base::TimeDelta(), audio_bus_.get());
+    mixer_.ConvertWithDelay(0, audio_bus_.get());
   }
   // Because the audio is being looped-back, the delay since since it was
   // recorded is zero.