Revert "Add Client Attribute to FetchEvent- Blink Side."

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 94432f0a577849cbdbb7916b3580d87b211f63a9..d2906f13eeab346e1c8e42d9dad5d554754fde90 100644
--- a/Source/modules/serviceworkers/FetchEvent.h
+++ b/Source/modules/serviceworkers/FetchEvent.h
@@ -11,7 +11,6 @@
 #include "modules/serviceworkers/ExtendableEvent.h"
 #include "modules/serviceworkers/FetchEventInit.h"
 #include "modules/serviceworkers/RespondWithObserver.h"
-#include "modules/serviceworkers/ServiceWorkerClient.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
@@ -31,7 +30,6 @@ public:
     static PassRefPtrWillBeRawPtr<FetchEvent> create(const AtomicString& type, FetchEventInit&, RespondWithObserver*);
 
     Request* request() const;
-    ServiceWorkerClient* client() const;
     bool isReload() const;
 
     void respondWith(ScriptState*, const ScriptValue&, ExceptionState&);
@@ -47,7 +45,6 @@ protected:
 private:
     PersistentWillBeMember<RespondWithObserver> m_observer;
     PersistentWillBeMember<Request> m_request;
-    PersistentWillBeMember<ServiceWorkerClient> m_client;
     bool m_isReload;
 };