Pass implementation object to supplemental classes by reference

Source/core/dom/DOMURLUtilsReadOnly.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2012 Motorola Mobility Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 14 matching lines @@
  */
 
 #include "config.h"
 #include "core/dom/DOMURLUtilsReadOnly.h"
 
 #include "platform/weborigin/KnownPorts.h"
 #include "platform/weborigin/SecurityOrigin.h"
 
 namespace WebCore {
 
-String DOMURLUtilsReadOnly::href(DOMURLUtilsReadOnly* impl)
+String DOMURLUtilsReadOnly::href(DOMURLUtilsReadOnly& impl)
 {
-    const KURL& url = impl->url();
+    const KURL& url = impl.url();
     if (url.isNull())
-        return impl->input();
+        return impl.input();
     return url.string();
 }
 
 String DOMURLUtilsReadOnly::origin(const KURL& url)
 {
     if (url.isNull())
         return "";
     return SecurityOrigin::create(url)->toString();
 }
 
@@ skipping 22 matching lines @@
 
 String DOMURLUtilsReadOnly::hash(const KURL& url)
 {
     String fragmentIdentifier = url.fragmentIdentifier();
     if (fragmentIdentifier.isEmpty())
         return emptyString();
     return AtomicString(String("#" + fragmentIdentifier));
 }
 
 } // namespace WebCore