Make ActiveScriptWrappable the GC mixin it is.

third_party/WebKit/Source/modules/fetch/Response.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 Response_h
 #define Response_h
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
@@ skipping 14 matching lines @@
 class ExceptionState;
 class FetchDataConsumerHandle;
 class ResponseInit;
 class ScriptState;
 class WebServiceWorkerResponse;
 
 class MODULES_EXPORT Response final : public Body {
     DEFINE_WRAPPERTYPEINFO();
     WTF_MAKE_NONCOPYABLE(Response);
 public:
-    ~Response() override { }
-
     // From Response.idl:
     static Response* create(ScriptState*, ExceptionState&);
     static Response* create(ScriptState*, ScriptValue body, const Dictionary&, ExceptionState&);
 
     static Response* create(ScriptState*, PassOwnPtr<FetchDataConsumerHandle> bodyHandle, const String& contentType, const ResponseInit&, ExceptionState&);
     static Response* create(ExecutionContext*, FetchResponseData*);
     static Response* create(ScriptState*, const WebServiceWorkerResponse&);
 
     static Response* createClone(const Response&);
 
@@ skipping 36 matching lines @@
     Response(ExecutionContext*, FetchResponseData*);
     Response(ExecutionContext*, FetchResponseData*, Headers*);
 
     const Member<FetchResponseData> m_response;
     const Member<Headers> m_headers;
 };
 
 } // namespace blink
 
 #endif // Response_h