Pass implementation object to supplemental classes by reference

Source/core/speech/SpeechInput.cpp

 /*
  * 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 102 matching lines @@
 {
     ASSERT(m_listeners.contains(listenerId));
     m_client->cancelRecognition(listenerId);
 }
 
 const char* SpeechInput::supplementName()
 {
     return "SpeechInput";
 }
 
-void provideSpeechInputTo(Page* page, SpeechInputClient* client)
+void provideSpeechInputTo(Page& page, SpeechInputClient* client)
 {
     SpeechInput::provideTo(page, SpeechInput::supplementName(), SpeechInput::create(client));
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(INPUT_SPEECH)