Move MediaQuery classes off BlinkGC heap

third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
index afbd37486b3cc38d4e9b356f3454e707d2db2dc4..101d5c9085a1b586f010474106088efe24a8a01d 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
@@ -127,9 +127,9 @@ static String InitiatorFor(const StringImpl* tag_impl) {
 
 static bool MediaAttributeMatches(const MediaValuesCached& media_values,
                                   const String& attribute_value) {
-  MediaQuerySet* media_queries = MediaQuerySet::Create(attribute_value);
+  RefPtr<MediaQuerySet> media_queries = MediaQuerySet::Create(attribute_value);
   MediaQueryEvaluator media_query_evaluator(media_values);
-  return media_query_evaluator.Eval(media_queries);
+  return media_query_evaluator.Eval(*media_queries);
 }
 
 class TokenPreloadScanner::StartTagScanner {