Move Fetch API releted code to modules/fetch.

Source/modules/serviceworkers/BodyStreamBuffer.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 BodyStreamBuffer_h
-#define BodyStreamBuffer_h
-
-#include "core/dom/DOMException.h"
-#include "platform/blob/BlobData.h"
-#include "platform/heap/Heap.h"
-#include "wtf/Deque.h"
-#include "wtf/RefPtr.h"
-#include "wtf/text/WTFString.h"
-
-namespace blink {
-
-class DOMArrayBuffer;
-
-class BodyStreamBuffer final : public GarbageCollectedFinalized<BodyStreamBuffer> {
-public:
-    class Observer : public GarbageCollectedFinalized<Observer> {
-    public:
-        virtual ~Observer() { }
-        virtual void onWrite() = 0;
-        virtual void onClose() = 0;
-        virtual void onError() = 0;
-        virtual void trace(Visitor*) { }
-    };
-    class BlobHandleCreatorClient : public GarbageCollectedFinalized<BlobHandleCreatorClient> {
-    public:
-        virtual ~BlobHandleCreatorClient() { }
-        virtual void didCreateBlobHandle(PassRefPtr<BlobDataHandle>) = 0;
-        virtual void didFail(PassRefPtrWillBeRawPtr<DOMException>) = 0;
-        virtual void trace(Visitor*) { }
-    };
-    BodyStreamBuffer();
-    ~BodyStreamBuffer() { }
-
-    PassRefPtr<DOMArrayBuffer> read();
-    bool isClosed() const { return m_isClosed; }
-    bool hasError() const { return m_exception; }
-    PassRefPtrWillBeRawPtr<DOMException> exception() const { return m_exception; }
-
-    // Can't call after close() or error() was called.
-    void write(PassRefPtr<DOMArrayBuffer>);
-    // Can't call after close() or error() was called.
-    void close();
-    // Can't call after close() or error() was called.
-    void error(PassRefPtrWillBeRawPtr<DOMException>);
-
-    // This function registers an observer so it fails and returns false when an
-    // observer was already registered
-    bool readAllAndCreateBlobHandle(const String& contentType, BlobHandleCreatorClient*);
-
-    // When an observer was registered this function fails and returns false.
-    bool registerObserver(Observer*);
-    void unregisterObserver();
-    bool isObserverRegistered() const { return m_observer.get(); }
-    void trace(Visitor*);
-
-private:
-    Deque<RefPtr<DOMArrayBuffer> > m_queue;
-    bool m_isClosed;
-    RefPtrWillBeMember<DOMException> m_exception;
-    Member<Observer> m_observer;
-};
-
-} // namespace blink
-
-#endif // BodyStreamBuffer_h