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

Source/web/WebMIDIPermissionRequest.cpp

 /*
  * 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 32 matching lines @@
 WebMIDIPermissionRequest::WebMIDIPermissionRequest(const PassRefPtr<WebCore::MIDIAccess>& midi)
     : m_private(midi)
 {
 }
 
 WebMIDIPermissionRequest::WebMIDIPermissionRequest(WebCore::MIDIAccess* midi)
     : m_private(midi)
 {
 }
 
+void WebMIDIPermissionRequest::assign(const WebMIDIPermissionRequest& other)
+{
+    m_private = other.m_private;
+}
+
+bool WebMIDIPermissionRequest::equals(const WebMIDIPermissionRequest& n) const
+{
+    return m_private.get() == n.m_private.get();
+}
+
 WebSecurityOrigin WebMIDIPermissionRequest::securityOrigin() const
 {
     return WebSecurityOrigin(m_private->scriptExecutionContext()->securityOrigin());
 }
 
 void WebMIDIPermissionRequest::setIsAllowed(bool allowed)
 {
     m_private->enableSysEx(allowed);
 }
 
 } // namespace WebKit