Move MediaQuery classes off BlinkGC heap

third_party/WebKit/Source/core/css/StyleRule.h

Index: third_party/WebKit/Source/core/css/StyleRule.h
diff --git a/third_party/WebKit/Source/core/css/StyleRule.h b/third_party/WebKit/Source/core/css/StyleRule.h
index 938e3141c2e584c13e029477c7cfdd224e057ee0..7429e0a215cc1b959e8c55c4b6ca3f40df272cdb 100644
--- a/third_party/WebKit/Source/core/css/StyleRule.h
+++ b/third_party/WebKit/Source/core/css/StyleRule.h
@@ -238,7 +238,7 @@ class CORE_EXPORT StyleRuleCondition : public StyleRuleGroup {
 
 class CORE_EXPORT StyleRuleMedia : public StyleRuleCondition {
  public:
-  static StyleRuleMedia* create(MediaQuerySet* media,
+  static StyleRuleMedia* create(RefPtr<MediaQuerySet> media,
                                 HeapVector<Member<StyleRuleBase>>& adoptRules) {
     return new StyleRuleMedia(media, adoptRules);
   }
@@ -250,10 +250,11 @@ class CORE_EXPORT StyleRuleMedia : public StyleRuleCondition {
   DECLARE_TRACE_AFTER_DISPATCH();
 
  private:
-  StyleRuleMedia(MediaQuerySet*, HeapVector<Member<StyleRuleBase>>& adoptRules);
+  StyleRuleMedia(RefPtr<MediaQuerySet>,
+                 HeapVector<Member<StyleRuleBase>>& adoptRules);
   StyleRuleMedia(const StyleRuleMedia&);
 
-  Member<MediaQuerySet> m_mediaQueries;
+  RefPtr<MediaQuerySet> m_mediaQueries;
 };
 
 class StyleRuleSupports : public StyleRuleCondition {