AudioConverter: Express delay in frames rather than msec.

media/base/audio_buffer_converter.cc

Index: media/base/audio_buffer_converter.cc
diff --git a/media/base/audio_buffer_converter.cc b/media/base/audio_buffer_converter.cc
index d8ea29ee6529c6767bc1b268dc51e2da3d55d913..c4e213ebb33b96a6559317b61b7d40d7c715e773 100644
--- a/media/base/audio_buffer_converter.cc
+++ b/media/base/audio_buffer_converter.cc
@@ -91,7 +91,7 @@ void AudioBufferConverter::ResetTimestampState() {
 }
 
 double AudioBufferConverter::ProvideInput(AudioBus* audio_bus,
-                                          base::TimeDelta buffer_delay) {
+                                          uint32_t frames_delayed) {
   DCHECK(is_flushing_ || input_frames_ >= audio_bus->frames());
 
   int requested_frames_left = audio_bus->frames();