Pass implementation object to supplemental classes by reference

Source/core/dom/CSSSelectorWatch.cpp

 /*
  * Copyright (C) 2013 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 36 matching lines @@
 
 CSSSelectorWatch::CSSSelectorWatch(Document& document)
     : m_document(document)
     , m_callbackSelectorChangeTimer(this, &CSSSelectorWatch::callbackSelectorChangeTimerFired)
     , m_timerExpirations(0)
 {
 }
 
 CSSSelectorWatch& CSSSelectorWatch::from(Document& document)
 {
-    CSSSelectorWatch* watch = static_cast<CSSSelectorWatch*>(DocumentSupplement::from(&document, kSupplementName));
+    CSSSelectorWatch* watch = static_cast<CSSSelectorWatch*>(DocumentSupplement::from(document, kSupplementName));
     if (!watch) {
         watch = new CSSSelectorWatch(document);
-        DocumentSupplement::provideTo(&document, kSupplementName, adoptPtr(watch));
+        DocumentSupplement::provideTo(document, kSupplementName, adoptPtr(watch));
     }
     return *watch;
 }
 
 void CSSSelectorWatch::callbackSelectorChangeTimerFired(Timer<CSSSelectorWatch>*)
 {
     // Should be ensured by updateSelectorMatches():
     ASSERT(!m_addedSelectors.isEmpty() || !m_removedSelectors.isEmpty());
 
     if (m_timerExpirations < 1) {
@@ skipping 87 matching lines @@
 
         RefPtr<StyleRule> rule = StyleRule::create();
         rule->wrapperAdoptSelectorList(selectorList);
         rule->setProperties(callbackPropertySet);
         m_watchedCallbackSelectors.append(rule.release());
     }
     m_document.changedSelectorWatch();
 }
 
 } // namespace WebCore