Expose and check origin of request in response for foreign fetch.

third_party/WebKit/Source/modules/serviceworkers/ForeignFetchEvent.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ForeignFetchEvent_h
 #define ForeignFetchEvent_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "modules/EventModules.h"
 #include "modules/ModulesExport.h"
@@ skipping 12 matching lines @@
 // context. ForeignFetchRespondWithObserver can be used to notify the client
 // about the service worker's response.
 class MODULES_EXPORT ForeignFetchEvent final : public ExtendableEvent {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static ForeignFetchEvent* create();
     static ForeignFetchEvent* create(const AtomicString& type, const ForeignFetchEventInit&);
     static ForeignFetchEvent* create(const AtomicString& type, const ForeignFetchEventInit&, ForeignFetchRespondWithObserver*);
 
     Request* request() const;
+    String origin() const;
 
     void respondWith(ScriptState*, ScriptPromise, ExceptionState&);
 
     const AtomicString& interfaceName() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     ForeignFetchEvent();
     ForeignFetchEvent(const AtomicString& type, const ForeignFetchEventInit&, ForeignFetchRespondWithObserver*);
 
 private:
     Member<ForeignFetchRespondWithObserver> m_observer;
     Member<Request> m_request;
+    String m_origin;
 };
 
 } // namespace blink
 
 #endif // ForeignFetchEvent_h