Sub-sample accurate start of OscillatorNode

third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.h

Index: third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.h
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.h b/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.h
index f56919f4a6d42a5d0629ed22206123698771a813..f410ad2f767660752f41ab29baa0f5a2592a052b 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.h
+++ b/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.h
@@ -88,10 +88,15 @@ class AudioScheduledSourceHandler : public AudioHandler {
   //                         rendering.
   // nonSilentFramesToProcess : Number of frames rendering non-silence (will be
   //                            <= quantumFrameSize).
+  // startFrameOffset : The fractional frame offset from quantumFrameOffset
+  //                    and the actual starting time of the source. This is
+  //                    non-zero only when transitioning from the
+  //                    SCHEDULED_STATE to the PLAYING_STATE.
   void updateSchedulingInfo(size_t quantumFrameSize,
                             AudioBus* outputBus,
                             size_t& quantumFrameOffset,
-                            size_t& nonSilentFramesToProcess);
+                            size_t& nonSilentFramesToProcess,
+                            double& startFrameOffset);
 
   // Called when we have no more sound to play or the stop() time has been
   // reached. No onEnded event is called.