Make WebMIDI use blink Promise.

Source/modules/webmidi/NavigatorWebMIDI.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef NavigatorWebMIDI_h
 #define NavigatorWebMIDI_h
 
+#include "bindings/v8/ScriptPromise.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "modules/webmidi/MIDIOptions.h"
 #include "platform/Supplementable.h"
+#include "wtf/HashSet.h"
+#include "wtf/RefPtr.h"
 
 namespace WebCore {
 
-class MIDIAccessPromise;
+class ExecutionContext;
+class Frame;
 class Navigator;
+class MIDIAccess;
 
 class NavigatorWebMIDI : public Supplement<Navigator>, public DOMWindowProperty {
 public:
     virtual ~NavigatorWebMIDI();
     static NavigatorWebMIDI* from(Navigator*);
 
-    static PassRefPtr<MIDIAccessPromise> requestMIDIAccess(Navigator*, const Dictionary&);
-    PassRefPtr<MIDIAccessPromise> requestMIDIAccess(const Dictionary&);
+    static ScriptPromise requestMIDIAccess(Navigator*, const Dictionary&);
+    ScriptPromise requestMIDIAccess(const Dictionary&);
+
+    void registerPending(MIDIAccess*);
+    void unregisterPending(MIDIAccess*);
 
 private:
+    void clearPending();
     NavigatorWebMIDI(Frame*);
     static const char* supplementName();
+    HashSet<RefPtr<MIDIAccess> > m_pending;
 };
 
 } // namespace WebCore
 
 #endif // NavigatorWebMIDI_h