Pass implementation object to supplemental classes by reference

Source/modules/quota/DOMWindowQuota.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 21 matching lines @@
 #include "modules/quota/DOMWindowQuota.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/DOMWindow.h"
 #include "core/frame/Frame.h"
 #include "modules/quota/DeprecatedStorageInfo.h"
 #include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
-DOMWindowQuota::DOMWindowQuota(DOMWindow* window)
-    : DOMWindowProperty(window->frame())
+DOMWindowQuota::DOMWindowQuota(DOMWindow& window)
+    : DOMWindowProperty(window.frame())
 {
 }
 
 DOMWindowQuota::~DOMWindowQuota()
 {
 }
 
 const char* DOMWindowQuota::supplementName()
 {
     return "DOMWindowQuota";
 }
 
 // static
-DOMWindowQuota* DOMWindowQuota::from(DOMWindow* window)
+DOMWindowQuota& DOMWindowQuota::from(DOMWindow& window)
 {
     DOMWindowQuota* supplement = static_cast<DOMWindowQuota*>(Supplement<DOMWindow>::from(window, supplementName()));
     if (!supplement) {
         supplement = new DOMWindowQuota(window);
         provideTo(window, supplementName(), adoptPtr(supplement));
     }
-    return supplement;
+    return *supplement;
 }
 
 // static
-DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo(DOMWindow* window)
+DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo(DOMWindow& window)
 {
-    return DOMWindowQuota::from(window)->webkitStorageInfo();
+    return DOMWindowQuota::from(window).webkitStorageInfo();
 }
 
 DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo() const
 {
     if (!m_storageInfo && frame())
         m_storageInfo = DeprecatedStorageInfo::create();
     return m_storageInfo.get();
 }
 
 } // namespace WebCore