Oilpan: Fix build after r180164.

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 1109 matching lines @@
     if (rule->type() != CSSRule::MEDIA_RULE) {
         exceptionState.throwDOMException(NotFoundError, "Cannot insert rule in non-media rule.");
         return 0;
     }
     return insertCSSOMRuleInMediaRule(toCSSMediaRule(rule.get()), sourceRange, ruleText, exceptionState);
 }
 
 bool InspectorStyleSheet::verifyRuleText(const String& ruleText)
 {
     DEFINE_STATIC_LOCAL(String, bogusPropertyName, ("-webkit-boguz-propertee"));
-    RefPtrWillBeRawPtr<MutableStylePropertySet> tempMutableStyle = MutableStylePropertySet::create();
     RuleSourceDataList sourceData;
     RefPtrWillBeRawPtr<StyleSheetContents> styleSheetContents = StyleSheetContents::create(strictCSSParserContext());
     String text = ruleText + " div { " + bogusPropertyName + ": none; }";
     StyleSheetHandler handler(text, ownerDocument(), styleSheetContents.get(), &sourceData);
     BisonCSSParser(parserContextForDocument(ownerDocument())).parseSheet(styleSheetContents.get(), text, TextPosition::minimumPosition(), &handler);
     unsigned ruleCount = sourceData.size();
 
     // Exactly two rules should be parsed.
     if (ruleCount != 2)
         return false;
@@ skipping 676 matching lines @@
 void InspectorStyleSheetForInlineStyle::trace(Visitor* visitor)
 {
     visitor->trace(m_element);
     visitor->trace(m_ruleSourceData);
     visitor->trace(m_inspectorStyle);
     InspectorStyleSheetBase::trace(visitor);
 }
 
 } // namespace blink