Make stylesheet owner node a reference instead of pointer.

third_party/WebKit/Source/core/inspector/InspectorStyleSheet.cpp

 /*
  * Copyright (C) 2010, 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 1347 matching lines @@
 void InspectorStyleSheet::innerSetText(const String& text, bool markAsLocallyModified)
 {
     RuleSourceDataList ruleTree;
     StyleSheetContents* styleSheet = StyleSheetContents::create(m_pageStyleSheet->contents()->parserContext());
     StyleSheetHandler handler(text, m_pageStyleSheet->ownerDocument(), &ruleTree);
     CSSParser::parseSheetForInspector(m_pageStyleSheet->contents()->parserContext(), styleSheet, text, handler);
     CSSStyleSheet* sourceDataSheet = nullptr;
     if (toCSSImportRule(m_pageStyleSheet->ownerRule()))
         sourceDataSheet = CSSStyleSheet::create(styleSheet, toCSSImportRule(m_pageStyleSheet->ownerRule()));
     else
-        sourceDataSheet = CSSStyleSheet::create(styleSheet, m_pageStyleSheet->ownerNode());
+        sourceDataSheet = CSSStyleSheet::create(styleSheet, *m_pageStyleSheet->ownerNode());
 
     m_parsedFlatRules.clear();
     collectFlatRules(sourceDataSheet, &m_parsedFlatRules);
 
     m_sourceData = wrapUnique(new RuleSourceDataList());
     flattenSourceData(ruleTree, m_sourceData.get());
     m_text = text;
 
     if (markAsLocallyModified) {
         Element* element = ownerStyleElement();
@@ skipping 483 matching lines @@
 }
 
 DEFINE_TRACE(InspectorStyleSheetForInlineStyle)
 {
     visitor->trace(m_element);
     visitor->trace(m_inspectorStyle);
     InspectorStyleSheetBase::trace(visitor);
 }
 
 } // namespace blink