Supporting a playbackTime attribute on AudioprocessingEvent.

Source/modules/webaudio/AudioProcessingEvent.cpp

Index: Source/modules/webaudio/AudioProcessingEvent.cpp
diff --git a/Source/modules/webaudio/AudioProcessingEvent.cpp b/Source/modules/webaudio/AudioProcessingEvent.cpp
index a00f779a81cf718736b197ce39d9cc0064698429..ed0d9d264c895fbc7fba7545a2802fc2607497ee 100644
--- a/Source/modules/webaudio/AudioProcessingEvent.cpp
+++ b/Source/modules/webaudio/AudioProcessingEvent.cpp
@@ -37,9 +37,9 @@ PassRefPtr<AudioProcessingEvent> AudioProcessingEvent::create()
     return adoptRef(new AudioProcessingEvent);
 }
 
-PassRefPtr<AudioProcessingEvent> AudioProcessingEvent::create(PassRefPtr<AudioBuffer> inputBuffer, PassRefPtr<AudioBuffer> outputBuffer)
+PassRefPtr<AudioProcessingEvent> AudioProcessingEvent::create(PassRefPtr<AudioBuffer> inputBuffer, PassRefPtr<AudioBuffer> outputBuffer, double playbackTime)
 {
-    return adoptRef(new AudioProcessingEvent(inputBuffer, outputBuffer));
+    return adoptRef(new AudioProcessingEvent(inputBuffer, outputBuffer, playbackTime));
 }
 
 AudioProcessingEvent::AudioProcessingEvent()
@@ -47,10 +47,11 @@ AudioProcessingEvent::AudioProcessingEvent()
     ScriptWrappable::init(this);
 }
 
-AudioProcessingEvent::AudioProcessingEvent(PassRefPtr<AudioBuffer> inputBuffer, PassRefPtr<AudioBuffer> outputBuffer)
+AudioProcessingEvent::AudioProcessingEvent(PassRefPtr<AudioBuffer> inputBuffer, PassRefPtr<AudioBuffer> outputBuffer, double playbackTime)
     : Event(EventTypeNames::audioprocess, true, false)
     , m_inputBuffer(inputBuffer)
     , m_outputBuffer(outputBuffer)
+    , m_playbackTime(playbackTime)
 {
     ScriptWrappable::init(this);
 }