Pass implementation object to supplemental classes by reference

Source/core/dom/DOMURLUtilsReadOnly.cpp

Index: Source/core/dom/DOMURLUtilsReadOnly.cpp
diff --git a/Source/core/dom/DOMURLUtilsReadOnly.cpp b/Source/core/dom/DOMURLUtilsReadOnly.cpp
index 15b1268115a156b6ca12a18907163dc91e4a5cb8..61dc0ad041160c8bcec4dbf48ec00821836ff50e 100644
--- a/Source/core/dom/DOMURLUtilsReadOnly.cpp
+++ b/Source/core/dom/DOMURLUtilsReadOnly.cpp
@@ -32,11 +32,11 @@
 
 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();
 }