Web MIDI: add assign() and equals() to WebMIDIPermissionRequest

public/web/WebMIDIPermissionRequest.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 31 matching lines @@
 
 class WebSecurityOrigin;
 
 // WebMIDIPermissionRequest encapsulates a WebCore MIDIAccess object and represents
 // a request from WebCore for permissions.
 // The underlying MIDIAccess object is guaranteed to be valid until the invocation of
 // either WebMIDIPermissionRequest::setIsAllowed (request complete) or
 // WebMIDIClient::cancelPermissionRequest (request canceled).
 class WebMIDIPermissionRequest {
 public:
+    WebMIDIPermissionRequest(const WebMIDIPermissionRequest& o) { assign(o); }
+
     WEBKIT_EXPORT WebSecurityOrigin securityOrigin() const;
     WEBKIT_EXPORT void setIsAllowed(bool);
 
+    WEBKIT_EXPORT void assign(const WebMIDIPermissionRequest&);
+    WEBKIT_EXPORT bool equals(const WebMIDIPermissionRequest&) const;
+
 #if WEBKIT_IMPLEMENTATION
     explicit WebMIDIPermissionRequest(const PassRefPtr<WebCore::MIDIAccess>&);
     explicit WebMIDIPermissionRequest(WebCore::MIDIAccess*);
 #endif
 
 private:
     WebPrivatePtr<WebCore::MIDIAccess> m_private;
 };
 
+inline bool operator==(const WebMIDIPermissionRequest& a, const WebMIDIPermissionRequest& b)
+{
+    return a.equals(b);
+}
+
+inline bool operator!=(const WebMIDIPermissionRequest& a, const WebMIDIPermissionRequest& b)
+{
+    return !(a == b);
+}
+
 } // namespace WebKit
 
 #endif // WebMIDIPermissionRequest_h