Pass delay and timestamp to AudioSourceCallback::OnMoreData.

base/time/time.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Time represents an absolute point in coordinated universal time (UTC),
 // internally represented as microseconds (s/1,000,000) since the Windows epoch
 // (1601-01-01 00:00:00 UTC). System-dependent clock interface routines are
 // defined in time_PLATFORM.cc. Note that values for Time may skew and jump
 // around as the operating system makes adjustments to synchronize (e.g., with
 // NTP servers). Thus, client code that uses the Time class must account for
@@ skipping 97 matching lines @@
 
   // Converts units of time to TimeDeltas.
   static constexpr TimeDelta FromDays(int days);
   static constexpr TimeDelta FromHours(int hours);
   static constexpr TimeDelta FromMinutes(int minutes);
   static constexpr TimeDelta FromSeconds(int64_t secs);
   static constexpr TimeDelta FromMilliseconds(int64_t ms);
   static constexpr TimeDelta FromSecondsD(double secs);
   static constexpr TimeDelta FromMillisecondsD(double ms);
   static constexpr TimeDelta FromMicroseconds(int64_t us);
+#if defined(OS_POSIX)
+  static TimeDelta FromTimeSpec(const timespec& ts);
+#endif
 #if defined(OS_WIN)
   static TimeDelta FromQPCValue(LONGLONG qpc_value);
 #endif
 
   // Converts an integer value representing TimeDelta to a class. This is used
   // when deserializing a |TimeDelta| structure, using a value known to be
   // compatible. It is not provided as a constructor because the integer type
   // may be unclear from the perspective of a caller.
   static TimeDelta FromInternalValue(int64_t delta) { return TimeDelta(delta); }
 
@@ skipping 597 matching lines @@
   // considered to have an ambiguous ordering.)
   static bool IsConsistentAcrossProcesses();
 
 #if defined(OS_WIN)
   // Translates an absolute QPC timestamp into a TimeTicks value. The returned
   // value has the same origin as Now(). Do NOT attempt to use this if
   // IsHighResolution() returns false.
   static TimeTicks FromQPCValue(LONGLONG qpc_value);
 #endif
 
+#if defined(OS_MACOSX)

[miu, 2016/09/16 18:35:58]

To prevent accidental use of this function on IOS:

  #if defined(OS_MACOSX) && !defined(OS_IOS)

[jameswest, 2016/09/19 23:32:36]

Done.

+  static TimeTicks FromMachAbsoluteTime(uint64_t mach_absolute_time);
+#endif
+
   // Get an estimate of the TimeTick value at the time of the UnixEpoch. Because
   // Time and TimeTicks respond differently to user-set time and NTP
   // adjustments, this number is only an estimate. Nevertheless, this can be
   // useful when you need to relate the value of TimeTicks to a real time and
   // date. Note: Upon first invocation, this function takes a snapshot of the
   // realtime clock to establish a reference point.  This function will return
   // the same value for the duration of the application, but will be different
   // in future application runs.
   static TimeTicks UnixEpoch();
 
@@ skipping 90 matching lines @@
   static void WaitUntilInitializedWin();
 #endif
 };
 
 // For logging use only.
 BASE_EXPORT std::ostream& operator<<(std::ostream& os, ThreadTicks time_ticks);
 
 }  // namespace base
 
 #endif  // BASE_TIME_TIME_H_