Use OwnPtr|PassOwnPtr to pass a pointer of SpeechInputClient

Source/core/speech/SpeechInputClient.h

 /*
  * Copyright (C) 2010 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 45 matching lines @@
     virtual bool startRecognition(int requestId, const IntRect& elementRect, const AtomicString& language, const String& grammar, SecurityOrigin*) = 0;
 
     // Stops audio recording and performs recognition with the audio recorded until now
     // (does not discard audio).
     virtual void stopRecording(int requestId) = 0;
 
     // Cancels an ongoing recognition and discards any audio recorded so far. No partial
     // recognition results are returned to the listener.
     virtual void cancelRecognition(int requestId) = 0;
 
-protected:
     virtual ~SpeechInputClient() { }
 };
 
-void provideSpeechInputTo(Page&, SpeechInputClient*);
+void provideSpeechInputTo(Page&, PassOwnPtr<SpeechInputClient>);
 
 } // namespace WebCore
 
 #endif // ENABLE(INPUT_SPEECH)
 
 #endif // SpeechInputClient_h