Add dictionary for OfflineAudioContext constructor

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

Index: third_party/WebKit/Source/modules/webaudio/OfflineAudioContext.h
diff --git a/third_party/WebKit/Source/modules/webaudio/OfflineAudioContext.h b/third_party/WebKit/Source/modules/webaudio/OfflineAudioContext.h
index 74501902ac01d14e58e5d899d4c3f8cc5086a6ba..6ab7431cb15c26aa0b9ad9cdeb84764201a9d42f 100644
--- a/third_party/WebKit/Source/modules/webaudio/OfflineAudioContext.h
+++ b/third_party/WebKit/Source/modules/webaudio/OfflineAudioContext.h
@@ -33,6 +33,7 @@
 namespace blink {
 
 class ExceptionState;
+class OfflineAudioContextOptions;
 class OfflineAudioDestinationHandler;
 
 class MODULES_EXPORT OfflineAudioContext final : public BaseAudioContext {
@@ -45,6 +46,10 @@ class MODULES_EXPORT OfflineAudioContext final : public BaseAudioContext {
                                      float sample_rate,
                                      ExceptionState&);
 
+  static OfflineAudioContext* Create(ExecutionContext*,
+                                     const OfflineAudioContextOptions&,
+                                     ExceptionState&);
+
   ~OfflineAudioContext() override;
 
   DECLARE_VIRTUAL_TRACE();