[oilpan] Make the oilpan branch build on Mac.

Source/core/css/MediaQueryExp.cpp

 /*
  * CSS Media Query
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2013 Apple 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:
@@ skipping 131 matching lines @@
         || mediaFeature == MediaFeatureNames::transitionMediaFeature
         || mediaFeature == MediaFeatureNames::animationMediaFeature
         || mediaFeature == MediaFeatureNames::view_modeMediaFeature
         || mediaFeature == MediaFeatureNames::pointerMediaFeature
         || mediaFeature == MediaFeatureNames::device_pixel_ratioMediaFeature
         || mediaFeature == MediaFeatureNames::resolutionMediaFeature;
 }
 
 inline MediaQueryExp::MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* valueList)
     : m_mediaFeature(mediaFeature)
-    , m_value(0)
     , m_isValid(false)
 {
     // Initialize media query expression that must have 1 or more values.
     if (valueList) {
         if (valueList->size() == 1) {
             CSSParserValue* value = valueList->current();
 
             // Media features that use CSSValueIDs.
             if (featureWithCSSValueID(mediaFeature, value))
                 m_value = CSSPrimitiveValue::createIdentifier(value->id);
@@ skipping 81 matching lines @@
 
 void MediaQueryExp::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
     info.addMember(m_mediaFeature, "mediaFeature");
     info.addMember(m_serializationCache, "serializationCache");
     info.addMember(m_value, "value");
 }
 
 } // namespace