Remove blink::ReadableStream

third_party/WebKit/Source/core/streams/UnderlyingSource.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 UnderlyingSource_h
-#define UnderlyingSource_h
-
-#include "bindings/core/v8/ScriptPromise.h"
-#include "bindings/core/v8/ScriptValue.h"
-#include "core/CoreExport.h"
-#include "platform/heap/Heap.h"
-
-namespace blink {
-
-class ScriptState;
-
-class CORE_EXPORT UnderlyingSource : public GarbageCollectedMixin {
-public:
-    virtual ~UnderlyingSource() { }
-
-    virtual void pullSource() = 0;
-    virtual ScriptPromise cancelSource(ScriptState*, ScriptValue reason) = 0;
-    DEFINE_INLINE_VIRTUAL_TRACE() { }
-};
-
-} // namespace blink
-
-#endif // UnderlyingSource_h
-