Make WebMIDI use blink Promise.

Source/bindings/v8/MIDIAccessResolver.h

Index: Source/bindings/v8/MIDIAccessResolver.h
diff --git a/LICENSE b/Source/bindings/v8/MIDIAccessResolver.h
similarity index 64%
copy from LICENSE
copy to Source/bindings/v8/MIDIAccessResolver.h
index 70bcb8ad118978579fa055f7ecc99604930900ce..e8207d5d54e69f49edc10831a479bc9525cc9955 100644
--- a/LICENSE
+++ b/Source/bindings/v8/MIDIAccessResolver.h
@@ -28,3 +28,40 @@
 // 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