Web MIDI: introduce WebMIDIClient API to request a permission

Source/core/platform/midi/MIDIAccessor.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 21 matching lines @@
 #define MIDIAccessor_h
 
 #include "public/platform/WebMIDIAccessor.h"
 #include "public/platform/WebMIDIAccessorClient.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
 class MIDIAccessorClient;
+class SecurityOrigin;
 
 class MIDIAccessor : public WebKit::WebMIDIAccessorClient {
 public:
     static PassOwnPtr<MIDIAccessor> create(MIDIAccessorClient*);
 
     virtual ~MIDIAccessor() { }
 
     void requestAccess(bool access);
     void sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp);
 
     // WebKit::WebMIDIAccessorClient
+    virtual WebKit::WebSecurityOrigin securityOrigin() const OVERRIDE;
+
     virtual void didAddInputPort(const WebKit::WebString& id, const WebKit::WebString& manufacturer, const WebKit::WebString& name, const WebKit::WebString& version) OVERRIDE;
     virtual void didAddOutputPort(const WebKit::WebString& id, const WebKit::WebString& manufacturer, const WebKit::WebString& name, const WebKit::WebString& version) OVERRIDE;
     virtual void didAllowAccess() OVERRIDE;
     virtual void didBlockAccess() OVERRIDE;
     virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) OVERRIDE;
 
 private:
     MIDIAccessor(MIDIAccessorClient*);
 
     MIDIAccessorClient* m_client;
     OwnPtr<WebKit::WebMIDIAccessor> m_accessor;
 };
 
 } // namespace WebCore
 
 #endif // MIDIAccessor_h