Move MediaQuery classes off BlinkGC heap

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

Index: third_party/WebKit/Source/core/css/MediaQuerySetTest.cpp
diff --git a/third_party/WebKit/Source/core/css/MediaQuerySetTest.cpp b/third_party/WebKit/Source/core/css/MediaQuerySetTest.cpp
index 458f085fc5eb9716309777c06f42fd0165eca718..a390c0a310817c5466f07f9c87431962942e5cb7 100644
--- a/third_party/WebKit/Source/core/css/MediaQuerySetTest.cpp
+++ b/third_party/WebKit/Source/core/css/MediaQuerySetTest.cpp
@@ -182,7 +182,8 @@ TEST(MediaQuerySetTest, Basic) {
   };
 
   for (unsigned i = 0; test_cases[i].input; ++i) {
-    MediaQuerySet* query_set = MediaQuerySet::Create(test_cases[i].input);
+    RefPtr<MediaQuerySet> query_set =
+        MediaQuerySet::Create(test_cases[i].input);
     TestMediaQuery(test_cases[i], *query_set);
   }
 }