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

media/audio/audio_input_controller.cc

Index: media/audio/audio_input_controller.cc
diff --git a/media/audio/audio_input_controller.cc b/media/audio/audio_input_controller.cc
index 7eef001eed1dcd60fab0f014aa2c411659f1b5e2..861f1b18b1639477a21b1009de663efafe93a162 100644
--- a/media/audio/audio_input_controller.cc
+++ b/media/audio/audio_input_controller.cc
@@ -115,13 +115,14 @@ class AudioInputController::AudioCallback
  private:
   void OnData(AudioInputStream* stream,
               const AudioBus* source,
-              uint32_t hardware_delay_bytes,
+              base::TimeDelta delay,
+              base::TimeTicks delay_timestamp,
               double volume) override {
     TRACE_EVENT0("audio", "AC::OnData");
 
     received_callback_ = true;
 
-    DeliverDataToSyncWriter(source, hardware_delay_bytes, volume);
+    DeliverDataToSyncWriter(source, delay, delay_timestamp, volume);
     PerformOptionalDebugRecording(source);
   }
 
@@ -155,11 +156,12 @@ class AudioInputController::AudioCallback
   }
 
   void DeliverDataToSyncWriter(const AudioBus* source,
-                               uint32_t hardware_delay_bytes,
+                               base::TimeDelta delay,
+                               base::TimeTicks delay_timestamp,
                                double volume) {
     bool key_pressed = controller_->CheckForKeyboardInput();
-    controller_->sync_writer_->Write(source, volume, key_pressed,
-                                     hardware_delay_bytes);
+    controller_->sync_writer_->Write(source, volume, key_pressed, delay,
+                                     delay_timestamp);

[o1ka, 2017/02/10 13:28:50]

Should we probably adjust delay and delay_timestamp at the process border?

[DaleCurtis, 2017/02/11 01:43:13]

delay should always be provided relative to delay_timestamp, so we shouldn't
need to do any adjustment to delay_timestamp, if there's buffering taking place
it should change |delay| though. For now I'm trying not to change anything
behaviorally though, just s/hardware_delay_bytes/delay/.

 
     // The way the two classes interact here, could be done in a nicer way.
     // As is, we call the AIC here to check the audio power, return  and then