Oilpan: fix build after r185003.

Source/core/css/parser/CSSParserImpl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CSSParserImpl_h
 #define CSSParserImpl_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/css/CSSProperty.h"
 #include "core/css/CSSPropertySourceData.h"
 #include "core/css/parser/CSSParserMode.h"
 #include "core/css/parser/CSSParserToken.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class MutableStylePropertySet;
 
 class CSSParserImpl {
+    STACK_ALLOCATED();
 public:
     CSSParserImpl(const CSSParserContext&, const String&);
     static bool parseValue(MutableStylePropertySet*, CSSPropertyID, const String&, bool important, const CSSParserContext&);
 
 private:
     void consumeDeclarationValue(CSSParserTokenIterator start, CSSParserTokenIterator end, CSSPropertyID, bool important, CSSRuleSourceData::Type);
 
     // FIXME: Can we build StylePropertySets directly?
     // FIXME: Investigate using a smaller inline buffer
     WillBeHeapVector<CSSProperty, 256> m_parsedProperties;
     Vector<CSSParserToken> m_tokens;
     CSSParserContext m_context;
 };
 
 } // namespace blink
 
 #endif // CSSParserImpl_h