Pass delay and timestamp to AudioSourceCallback::OnMoreData.

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 d5c699a09e28a821fd1e7107ca1cd6be9858d24a..77758d6eca0cb37cfce0925111aacc3563dc25f7 100644
--- a/media/audio/pulse/pulse_util.cc
+++ b/media/audio/pulse/pulse_util.cc
@@ -8,7 +8,6 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/time/time.h"
 #include "media/audio/audio_device_description.h"
 #include "media/base/audio_parameters.h"
 
@@ -136,20 +135,24 @@ void WaitForOperationCompletion(pa_threaded_mainloop* pa_mainloop,
   pa_operation_unref(operation);
 }
 
-int GetHardwareLatencyInBytes(pa_stream* stream,
-                              int sample_rate,
-                              int bytes_per_frame) {
+base::TimeDelta GetHardwareLatency(pa_stream* stream) {
   DCHECK(stream);
   int negative = 0;
   pa_usec_t latency_micros = 0;
   if (pa_stream_get_latency(stream, &latency_micros, &negative) != 0)
-    return 0;
+    return base::TimeDelta();
 
   if (negative)
-    return 0;
+    return base::TimeDelta();
+
+  return base::TimeDelta::FromMicroseconds(latency_micros);
+}
 
-  return latency_micros * sample_rate * bytes_per_frame /
-      base::Time::kMicrosecondsPerSecond;
+int GetHardwareLatencyInBytes(pa_stream* stream,
+                              int sample_rate,
+                              int bytes_per_frame) {
+  DCHECK(stream);
+  return GetHardwareLatency(stream).InSeconds() * sample_rate * bytes_per_frame;

[miu, 2016/08/31 23:26:55]

s/InSeconds/InSecondsF/ to prevent serious loss of precision!

[James West, 2016/09/13 07:40:50]

Done.

 }
 
 // Helper macro for CreateInput/OutputStream() to avoid code spam and