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

media/audio/mac/audio_input_mac.cc

Index: media/audio/mac/audio_input_mac.cc
diff --git a/media/audio/mac/audio_input_mac.cc b/media/audio/mac/audio_input_mac.cc
index 8fc18d3d7807b6da332ae49d149eb3f9e05b524a..f727aa8dfbbc108a2220f60cf220c85076440352 100644
--- a/media/audio/mac/audio_input_mac.cc
+++ b/media/audio/mac/audio_input_mac.cc
@@ -232,7 +232,11 @@ void PCMQueueInAudioInputStream::HandleInputBuffer(
     audio_bus_->FromInterleaved(
         audio_data, audio_bus_->frames(), format_.mBitsPerChannel / 8);
     callback_->OnData(
-        this, audio_bus_.get(), audio_buffer->mAudioDataByteSize, 0.0);
+        this, audio_bus_.get(),
+        base::TimeDelta::FromSecondsD(
+            audio_buffer->mAudioDataByteSize /
+            static_cast<double>(format_.mBytesPerFrame * format_.mSampleRate)),
+        base::TimeTicks::Now(), 0.0);
 
     last_fill_ = base::TimeTicks::Now();
   }