Move MediaQuery classes off BlinkGC heap

third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h

Index: third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
diff --git a/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h b/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
index ed96f5562caa0b18eef0d97316f84c8b4c0479f9..64470c3ffdeaf17e789aff6f296c7c2e4f8cc7af 100644
--- a/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
+++ b/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
@@ -26,10 +26,10 @@ class CORE_EXPORT SizesAttributeParser {
   bool parse(CSSParserTokenRange);
   float effectiveSize();
   bool calculateLengthInPixels(CSSParserTokenRange, float& result);
-  bool mediaConditionMatches(MediaQuerySet* mediaCondition);
+  bool mediaConditionMatches(const MediaQuerySet& mediaCondition);
   float effectiveSizeDefaultValue();
 
-  Member<MediaQuerySet> m_mediaCondition;
+  RefPtr<MediaQuerySet> m_mediaCondition;
   Member<MediaValues> m_mediaValues;
   float m_length;
   bool m_lengthWasSet;