CL for perf tryjob on linux

media/renderers/audio_renderer_impl.cc

Index: media/renderers/audio_renderer_impl.cc
diff --git a/media/renderers/audio_renderer_impl.cc b/media/renderers/audio_renderer_impl.cc
index afd298b657701e96f52946849041fb91d08d9d19..715ae2a8b8dec6442bc17a690e32b104f16f9320 100644
--- a/media/renderers/audio_renderer_impl.cc
+++ b/media/renderers/audio_renderer_impl.cc
@@ -181,15 +181,17 @@ void AudioRendererImpl::SetMediaTime(base::TimeDelta time) {
   audio_clock_.reset(new AudioClock(time, audio_parameters_.sample_rate()));
 }
 
-base::TimeDelta AudioRendererImpl::CurrentMediaTime() {
+base::TimeDelta AudioRendererImpl::CurrentMediaTime(
+    base::TimeTicks* reference) {
   base::AutoLock auto_lock(lock_);
 
   // Return the current time based on the known extents of the rendered audio
   // data plus an estimate based on the last time those values were calculated.
+  base::TimeTicks now_ticks;
   base::TimeDelta current_media_time = audio_clock_->front_timestamp();
   if (!last_render_time_.is_null()) {
-    current_media_time +=
-        (tick_clock_->NowTicks() - last_render_time_) * playback_rate_;
+    now_ticks = tick_clock_->NowTicks();
+    current_media_time += (now_ticks - last_render_time_) * playback_rate_;
     if (current_media_time > audio_clock_->back_timestamp())
       current_media_time = audio_clock_->back_timestamp();
   }
@@ -203,11 +205,16 @@ base::TimeDelta AudioRendererImpl::CurrentMediaTime() {
   if (current_media_time < last_media_timestamp_) {
     DVLOG(2) << __func__ << ": " << last_media_timestamp_
              << " (clamped), actual: " << current_media_time;
-    return last_media_timestamp_;
+    current_media_time = last_media_timestamp_;
+  } else {
+    last_media_timestamp_ = current_media_time;
+  }
+
+  if (reference) {
+    *reference = now_ticks.is_null() ? tick_clock_->NowTicks() : now_ticks;
   }
 
   DVLOG(2) << __func__ << ": " << current_media_time;
-  last_media_timestamp_ = current_media_time;
   return current_media_time;
 }