media::SilentSinkSuspender should simulate |delay| and |delay_timestamp|

media/base/silent_sink_suspender.h

 // Copyright 2016 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.
 
 #ifndef MEDIA_BASE_SILENT_SINK_SUSPENDER_H_
 #define MEDIA_BASE_SILENT_SINK_SUSPENDER_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 85 matching lines @@
   bool is_transition_pending_ = false;
 
   // Buffers accumulated during the transition from |fake_sink_| to |sink_|.
   std::deque<std::unique_ptr<AudioBus>> buffers_after_silence_;
 
   // A cancelable task that is posted to switch to or from the |fake_sink_|
   // after a period of silence or first non-silent audio respective. We do this
   // on Android to save battery consumption.
   base::CancelableCallback<void(bool)> sink_transition_callback_;
 
+  // Audio output delay at the moment when transition to |fake_sink_| starts.
+  base::TimeDelta latest_output_delay_;
+  // Audio output delay timestamp at the moment when transition to |fake_sink_|
+  // starts.
+  base::TimeTicks latest_output_delay_timestamp_;
+  // Time when transition to |fake_sink_| starts.
+  base::TimeTicks fake_sink_transition_time_;
+
   DISALLOW_COPY_AND_ASSIGN(SilentSinkSuspender);
 };
 
 }  // namespace content
 
 #endif  // MEDIA_BASE_SILENT_SINK_SUSPENDER_H_