AudioConverter: Express delay in frames rather than msec.

media/base/audio_buffer_converter.h

Index: media/base/audio_buffer_converter.h
diff --git a/media/base/audio_buffer_converter.h b/media/base/audio_buffer_converter.h
index 37d909d95f993b310759bdfa8e587a7cbccb3e1c..55e7ab99cb857fff51a12a181f659ef6604bd4a1 100644
--- a/media/base/audio_buffer_converter.h
+++ b/media/base/audio_buffer_converter.h
@@ -51,8 +51,7 @@ class MEDIA_EXPORT AudioBufferConverter : public AudioConverter::InputCallback {
 
  private:
   // Callback to provide data to the AudioConverter
-  double ProvideInput(AudioBus* audio_bus,
-                      base::TimeDelta buffer_delay) override;
+  double ProvideInput(AudioBus* audio_bus, uint32_t frames_delayed) override;
 
   // Reset the converter in response to a configuration change.
   void ResetConverter(const scoped_refptr<AudioBuffer>& input_buffer);