Introducing FetchEventInit Dictionary.

Source/modules/serviceworkers/FetchEvent.h

Index: Source/modules/serviceworkers/FetchEvent.h
diff --git a/Source/modules/serviceworkers/FetchEvent.h b/Source/modules/serviceworkers/FetchEvent.h
index 4c4d4b27701e03d19cbc3516ab1757c43dc46f5d..d181280344d998a7c53fb911f9cc352d5cca71ee 100644
--- a/Source/modules/serviceworkers/FetchEvent.h
+++ b/Source/modules/serviceworkers/FetchEvent.h
@@ -7,6 +7,7 @@
 
 #include "modules/EventModules.h"
 #include "modules/fetch/Request.h"
+#include "modules/serviceworkers/FetchEventInit.h"
 #include "modules/serviceworkers/RespondWithObserver.h"
 #include "platform/heap/Handle.h"
 
@@ -23,7 +24,8 @@ class FetchEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<FetchEvent> create();
-    static PassRefPtrWillBeRawPtr<FetchEvent> create(RespondWithObserver*, Request*);
+    static PassRefPtrWillBeRawPtr<FetchEvent> create(const AtomicString& type, const FetchEventInit&);
+    static PassRefPtrWillBeRawPtr<FetchEvent> create(const AtomicString& type, const FetchEventInit&, RespondWithObserver*);
 
     Request* request() const;
     bool isReload() const;
@@ -38,7 +40,8 @@ public:
 
 protected:
     FetchEvent();
-    FetchEvent(RespondWithObserver*, Request*);
+    FetchEvent(const AtomicString& type, const FetchEventInit&);
+    FetchEvent(const AtomicString& type, const FetchEventInit&, RespondWithObserver*);
 
 private:
     PersistentWillBeMember<RespondWithObserver> m_observer;