Revert of Make WebMIDI use blink Promise.

Source/bindings/v8/MIDIAccessResolver.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 MIDIAccessResolver_h
-#define MIDIAccessResolver_h
-
-#include "bindings/v8/ScriptPromiseResolver.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/RefCounted.h"
-
-namespace WebCore {
-
-class DOMError;
-class DOMWrapperWorld;
-class ExecutionContext;
-class MIDIAccess;
-
-class MIDIAccessResolver {
-    WTF_MAKE_NONCOPYABLE(MIDIAccessResolver);
-public:
-    static PassOwnPtr<MIDIAccessResolver> create(PassRefPtr<ScriptPromiseResolver> resolver, v8::Isolate* isolate)
-    {
-        return adoptPtr(new MIDIAccessResolver(resolver, isolate));
-    }
-    ~MIDIAccessResolver();
-
-    ScriptPromise promise() { return m_resolver->promise(); }
-
-    void resolve(MIDIAccess*, ExecutionContext*);
-    void reject(DOMError*, ExecutionContext*);
-
-private:
-    MIDIAccessResolver(PassRefPtr<ScriptPromiseResolver>, v8::Isolate*);
-
-    RefPtr<ScriptPromiseResolver> m_resolver;
-    RefPtr<DOMWrapperWorld> m_world;
-};
-
-} // namespace WebCore
-
-#endif // #ifndef MIDIAccessResolver_h