Make Response::body return v8-extra based stream behind flag

third_party/WebKit/Source/modules/fetch/FetchResponseData.h

 // Copyright 2014 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 FetchResponseData_h
 #define FetchResponseData_h
 
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerRequest.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class BodyStreamBuffer;
-class ExecutionContext;
 class FetchHeaderList;
+class ScriptState;
 class WebServiceWorkerResponse;
 
 class MODULES_EXPORT FetchResponseData final : public GarbageCollectedFinalized<FetchResponseData> {
     WTF_MAKE_NONCOPYABLE(FetchResponseData);
 public:
     // "A response has an associated type which is one of basic, CORS, default,
     // error, opaque, and opaqueredirect. Unless stated otherwise, it is
     // default."
     enum Type { BasicType, CORSType, DefaultType, ErrorType, OpaqueType, OpaqueRedirectType };
     // "A response can have an associated termination reason which is one of
     // end-user abort, fatal, and timeout."
     enum TerminationReason { EndUserAbortTermination, FatalTermination, TimeoutTermination };
 
     static FetchResponseData* create();
     static FetchResponseData* createNetworkErrorResponse();
     static FetchResponseData* createWithBuffer(BodyStreamBuffer*);
 
     FetchResponseData* createBasicFilteredResponse();
     FetchResponseData* createCORSFilteredResponse();
     FetchResponseData* createOpaqueFilteredResponse();
     FetchResponseData* createOpaqueRedirectFilteredResponse();
 
-    FetchResponseData* clone(ExecutionContext*);
+    FetchResponseData* clone(ScriptState*);
 
     Type getType() const { return m_type; }
     const KURL& url() const { return m_url; }
     unsigned short status() const { return m_status; }
     AtomicString statusMessage() const { return m_statusMessage; }
     FetchHeaderList* headerList() const { return m_headerList.get(); }
     BodyStreamBuffer* buffer() const { return m_buffer; }
     String mimeType() const;
     BodyStreamBuffer* internalBuffer() const;
     String internalMIMEType() const;
@@ skipping 30 matching lines @@
     Member<FetchResponseData> m_internalResponse;
     Member<BodyStreamBuffer> m_buffer;
     String m_mimeType;
     int64_t m_responseTime;
     String m_cacheStorageCacheName;
 };
 
 } // namespace blink
 
 #endif // FetchResponseData_h