Make WebMIDI use blink Promise.

Source/bindings/v8/MIDIAccessResolver.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 //
 // The Chromium Authors can be found at
 // http://src.chromium.org/svn/trunk/src/AUTHORS
 //
 // 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
@@ skipping 10 matching lines @@
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // 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 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, ExecutionContext* executionContext)
+    {
+        return adoptPtr(new MIDIAccessResolver(resolver, executionContext));
+    }
+    ~MIDIAccessResolver();
+
+    void resolve(MIDIAccess*, ExecutionContext*);
+    void reject(DOMError*, ExecutionContext*);
+
+private:
+    MIDIAccessResolver(PassRefPtr<ScriptPromiseResolver>, ExecutionContext*);
+
+    RefPtr<ScriptPromiseResolver> m_resolver;
+    RefPtr<DOMWrapperWorld> m_world;
+};
+
+} // namespace WebCore
+
+#endif // #ifndef MIDIAccessResolver_h