Switch browser side audio capture path to use base time primitives.

media/audio/pulse/pulse_util.cc

Index: media/audio/pulse/pulse_util.cc
diff --git a/media/audio/pulse/pulse_util.cc b/media/audio/pulse/pulse_util.cc
index ba4d4bed83757c8135d7d7c9da1b47a02f43f6f5..fab258d6b3945febfa9f8038243c47be25da5cf5 100644
--- a/media/audio/pulse/pulse_util.cc
+++ b/media/audio/pulse/pulse_util.cc
@@ -149,15 +149,6 @@ base::TimeDelta GetHardwareLatency(pa_stream* stream) {
   return base::TimeDelta::FromMicroseconds(latency_micros);
 }
 
-int GetHardwareLatencyInBytes(pa_stream* stream,
-                              int sample_rate,
-                              int bytes_per_frame) {
-  DCHECK(stream);
-  return AudioTimestampHelper::TimeToFrames(GetHardwareLatency(stream),
-                                            sample_rate) *
-         bytes_per_frame;
-}
-
 // Helper macro for CreateInput/OutputStream() to avoid code spam and
 // string bloat.
 #define RETURN_ON_FAILURE(expression, message) do { \