Make WebMIDI use blink Promise.

Source/bindings/v8/MIDIAccessResolver.h

Index: Source/bindings/v8/MIDIAccessResolver.h
diff --git a/Source/bindings/v8/MIDIAccessResolver.h b/Source/bindings/v8/MIDIAccessResolver.h
new file mode 100644
index 0000000000000000000000000000000000000000..cfceb23920db8dd692a8fbb817a0cc16da2ce5c6
--- /dev/null
+++ b/Source/bindings/v8/MIDIAccessResolver.h
@@ -0,0 +1,42 @@
+// 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