Oilpan: fix build after r198129.

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 585 matching lines @@
         delete [] backtrack[i];
     }
     delete [] diff;
     delete [] backtrack;
 }
 
 String canonicalCSSText(RefPtrWillBeRawPtr<CSSRule> rule)
 {
     if (rule->type() != CSSRule::STYLE_RULE)
         return rule->cssText();
-    RefPtr<CSSStyleRule> styleRule = toCSSStyleRule(rule.get());
+    RefPtrWillBeRawPtr<CSSStyleRule> styleRule = toCSSStyleRule(rule.get());
 
     Vector<String> propertyNames;
     HashSet<String> propertyNameSet;
     CSSStyleDeclaration* style = styleRule->style();
     for (unsigned i = 0; i < style->length(); ++i) {
         String name = style->item(i);
         String shorthand = style->getPropertyShorthand(name);
         if (!shorthand.isEmpty())
             name = shorthand;
         if (propertyNameSet.contains(name))
@@ skipping 1092 matching lines @@
 }
 
 DEFINE_TRACE(InspectorStyleSheetForInlineStyle)
 {
     visitor->trace(m_element);
     visitor->trace(m_inspectorStyle);
     InspectorStyleSheetBase::trace(visitor);
 }
 
 } // namespace blink