Pass implementation object to supplemental classes by reference

Source/modules/speech/DOMWindowSpeechSynthesis.cpp

 /*
  * Copyright (C) 2012 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 19 matching lines @@
 
 #include "config.h"
 #include "modules/speech/DOMWindowSpeechSynthesis.h"
 
 #include "core/frame/DOMWindow.h"
 #include "core/frame/Frame.h"
 #include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
-DOMWindowSpeechSynthesis::DOMWindowSpeechSynthesis(DOMWindow* window)
-    : DOMWindowProperty(window->frame())
+DOMWindowSpeechSynthesis::DOMWindowSpeechSynthesis(DOMWindow& window)
+    : DOMWindowProperty(window.frame())
 {
 }
 
 DOMWindowSpeechSynthesis::~DOMWindowSpeechSynthesis()
 {
 }
 
 const char* DOMWindowSpeechSynthesis::supplementName()
 {
     return "DOMWindowSpeechSynthesis";
 }
 
 // static
-DOMWindowSpeechSynthesis* DOMWindowSpeechSynthesis::from(DOMWindow* window)
+DOMWindowSpeechSynthesis& DOMWindowSpeechSynthesis::from(DOMWindow& window)
 {
     DOMWindowSpeechSynthesis* supplement = static_cast<DOMWindowSpeechSynthesis*>(Supplement<DOMWindow>::from(window, supplementName()));
     if (!supplement) {
         supplement = new DOMWindowSpeechSynthesis(window);
         provideTo(window, supplementName(), adoptPtr(supplement));
     }
-    return supplement;
+    return *supplement;
 }
 
 // static
-SpeechSynthesis* DOMWindowSpeechSynthesis::speechSynthesis(DOMWindow* window)
+SpeechSynthesis* DOMWindowSpeechSynthesis::speechSynthesis(DOMWindow& window)
 {
-    return DOMWindowSpeechSynthesis::from(window)->speechSynthesis();
+    return DOMWindowSpeechSynthesis::from(window).speechSynthesis();
 }
 
 SpeechSynthesis* DOMWindowSpeechSynthesis::speechSynthesis()
 {
     if (!m_speechSynthesis && frame())
         m_speechSynthesis = SpeechSynthesis::create(frame()->domWindow()->executionContext());
     return m_speechSynthesis.get();
 }
 
 } // namespace WebCore