Move MediaQuery classes off BlinkGC heap

third_party/WebKit/Source/core/css/StyleMedia.cpp

Index: third_party/WebKit/Source/core/css/StyleMedia.cpp
diff --git a/third_party/WebKit/Source/core/css/StyleMedia.cpp b/third_party/WebKit/Source/core/css/StyleMedia.cpp
index 1dfa8980786d0cdbdebeaee0cfc46c819a911815..c08c9ac1668569a925b4d5efda1d0e28c6c70dc3 100644
--- a/third_party/WebKit/Source/core/css/StyleMedia.cpp
+++ b/third_party/WebKit/Source/core/css/StyleMedia.cpp
@@ -53,12 +53,12 @@ bool StyleMedia::matchMedium(const String& query) const {
   if (!document_element)
     return false;
 
-  MediaQuerySet* media = MediaQuerySet::Create();
+  RefPtr<MediaQuerySet> media = MediaQuerySet::Create();
   if (!media->Set(query))
     return false;
 
   MediaQueryEvaluator screen_eval(GetFrame());
-  return screen_eval.Eval(media);
+  return screen_eval.Eval(*media);
 }
 
 DEFINE_TRACE(StyleMedia) {