Request construction spec changes to use the 'used' flag.

Source/modules/serviceworkers/Body.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 Body_h
 #define Body_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptWrappable.h"
@@ skipping 32 matching lines @@
     ScriptPromise text(ScriptState*);
 
     bool bodyUsed() const;
 
     // ActiveDOMObject override.
     virtual void stop() OVERRIDE;
     virtual bool hasPendingActivity() const OVERRIDE;
 
     virtual void trace(Visitor*) { }
 
+protected:
+    // Sets the bodyUsed flag to true. This signifies that the contents of the
+    // body have been consumed and cannot be accessed again.
+    void setBodyUsed();
+
 private:
     ScriptPromise readAsync(ScriptState*, ResponseType);
     void resolveJSON();
 
     // FileReaderLoaderClient functions.
     virtual void didStartLoading() OVERRIDE;
     virtual void didReceiveData() OVERRIDE;
     virtual void didFinishLoading() OVERRIDE;
     virtual void didFail(FileError::ErrorCode) OVERRIDE;
 
     virtual PassRefPtr<BlobDataHandle> blobDataHandle() = 0;
 
     OwnPtr<FileReaderLoader> m_loader;
     bool m_bodyUsed;
     ResponseType m_responseType;
     RefPtr<ScriptPromiseResolver> m_resolver;
 };
 
 } // namespace blink
 
 #endif // Body_h