Make WebMIDI use blink Promise.

Source/modules/webmidi/NavigatorWebMIDI.h

Index: Source/modules/webmidi/NavigatorWebMIDI.h
diff --git a/Source/modules/webmidi/NavigatorWebMIDI.h b/Source/modules/webmidi/NavigatorWebMIDI.h
index 3d7f9221f1a8f3869758911ddf56ea9f4f2ccd0b..cea3e06448032de3a23c8862381fa49b67106698 100644
--- a/Source/modules/webmidi/NavigatorWebMIDI.h
+++ b/Source/modules/webmidi/NavigatorWebMIDI.h
@@ -31,6 +31,7 @@
 #ifndef NavigatorWebMIDI_h
 #define NavigatorWebMIDI_h
 
+#include "bindings/v8/ScriptPromise.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "heap/Handle.h"
 #include "modules/webmidi/MIDIOptions.h"
@@ -38,7 +39,6 @@
 
 namespace WebCore {
 
-class MIDIAccessPromise;
 class Navigator;
 
 class NavigatorWebMIDI FINAL : public NoBaseWillBeGarbageCollectedFinalized<NavigatorWebMIDI>, public WillBeHeapSupplement<Navigator>, public DOMWindowProperty {
@@ -47,8 +47,8 @@ public:
     virtual ~NavigatorWebMIDI();
     static NavigatorWebMIDI& from(Navigator&);
 
-    static PassRefPtrWillBeRawPtr<MIDIAccessPromise> requestMIDIAccess(Navigator&, const Dictionary&);
-    PassRefPtrWillBeRawPtr<MIDIAccessPromise> requestMIDIAccess(const Dictionary&);
+    static ScriptPromise requestMIDIAccess(Navigator&, const Dictionary&);
+    ScriptPromise requestMIDIAccess(const Dictionary&);
 
     void trace(Visitor*) { }