Add constructors for WebAudio events

third_party/WebKit/Source/modules/webaudio/AudioProcessingEvent.cpp

Index: third_party/WebKit/Source/modules/webaudio/AudioProcessingEvent.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioProcessingEvent.cpp b/third_party/WebKit/Source/modules/webaudio/AudioProcessingEvent.cpp
index dd9562c6b161db772df19e8caf728770d475211d..326c156b955fb5707c1daf52338f87f3b8b642c8 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioProcessingEvent.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/AudioProcessingEvent.cpp
@@ -24,6 +24,7 @@
  */
 
 #include "modules/webaudio/AudioProcessingEvent.h"
+#include "modules/webaudio/AudioProcessingEventInit.h"
 
 namespace blink {
 
@@ -37,6 +38,12 @@ AudioProcessingEvent* AudioProcessingEvent::create(AudioBuffer* inputBuffer,
   return new AudioProcessingEvent(inputBuffer, outputBuffer, playbackTime);
 }
 
+AudioProcessingEvent* AudioProcessingEvent::create(
+    const AtomicString& type,
+    const AudioProcessingEventInit& initializer) {
+  return new AudioProcessingEvent(type, initializer);
+}
+
 AudioProcessingEvent::AudioProcessingEvent() {}
 
 AudioProcessingEvent::AudioProcessingEvent(AudioBuffer* inputBuffer,
@@ -47,6 +54,15 @@ AudioProcessingEvent::AudioProcessingEvent(AudioBuffer* inputBuffer,
       m_outputBuffer(outputBuffer),
       m_playbackTime(playbackTime) {}
 
+AudioProcessingEvent::AudioProcessingEvent(
+    const AtomicString& type,
+    const AudioProcessingEventInit& initializer)
+    : Event(type, initializer) {
+  m_inputBuffer = initializer.inputBuffer();
+  m_outputBuffer = initializer.outputBuffer();
+  m_playbackTime = initializer.playbackTime();
+}
+
 AudioProcessingEvent::~AudioProcessingEvent() {}
 
 const AtomicString& AudioProcessingEvent::interfaceName() const {