Make WebMIDI use blink Promise.

Source/bindings/v8/V8Binding.h

 /*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2012 Ericsson AB. 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.
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 void addHiddenValueToArray(v8::Handle<v8::Object>, v8::Local<v8::Value>, int cacheIndex, v8::Isolate*);
 void removeHiddenValueFromArray(v8::Handle<v8::Object>, v8::Local<v8::Value>, int cacheIndex, v8::Isolate*);
 void moveEventListenerToNewWrapper(v8::Handle<v8::Object>, EventListener* oldValue, v8::Local<v8::Value> newValue, int cacheIndex, v8::Isolate*);
 
 // Converts a DOM object to a v8 value.
 // This is a no-inline version of toV8(). If you want to call toV8()
 // without creating #include cycles, you can use this function instead.
 // Each specialized implementation will be generated.
 template<typename T>
 v8::Handle<v8::Value> toV8NoInline(T* impl, v8::Handle<v8::Object> creationContext, v8::Isolate*);
+template<typename T>
+v8::Handle<v8::Value> toV8NoInline(T* impl, ExecutionContext* context)
+{
+    v8::Isolate* isolate = toIsolate(context);
+    v8::Handle<v8::Context> v8Context = toV8Context(context, DOMWrapperWorld::current(isolate));
+    return toV8NoInline(impl, v8Context->Global(), isolate);
+}
 
 // Result values for platform object 'deleter' methods,
 // http://www.w3.org/TR/WebIDL/#delete
 enum DeleteResult {
     DeleteSuccess,
     DeleteReject,
     DeleteUnknownProperty
 };
 
 class V8IsolateInterruptor : public ThreadState::Interruptor {
@@ skipping 28 matching lines @@
     v8::HandleScope m_handleScope;
     v8::Handle<v8::Context> m_context;
     v8::Context::Scope m_contextScope;
     RefPtr<DOMWrapperWorld> m_world;
     OwnPtr<V8PerContextData> m_perContextData;
 };
 
 } // namespace WebCore
 
 #endif // V8Binding_h