CSSMediaRule and CSSSupportsRule inherit from CSSConditionRule

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

Index: third_party/WebKit/Source/core/css/CSSSupportsRule.h
diff --git a/third_party/WebKit/Source/core/css/CSSSupportsRule.h b/third_party/WebKit/Source/core/css/CSSSupportsRule.h
index ad78da92a91ac5c8cb0c6b83c214f5135c29e996..e883b250d91e3749dc68b643882c6d5318693837 100644
--- a/third_party/WebKit/Source/core/css/CSSSupportsRule.h
+++ b/third_party/WebKit/Source/core/css/CSSSupportsRule.h
@@ -29,13 +29,13 @@
 #ifndef CSSSupportsRule_h
 #define CSSSupportsRule_h
 
-#include "core/css/CSSGroupingRule.h"
+#include "core/css/CSSConditionRule.h"
 
 namespace blink {
 
 class StyleRuleSupports;
 
-class CSSSupportsRule final : public CSSGroupingRule {
+class CSSSupportsRule final : public CSSConditionRule {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
@@ -48,10 +48,6 @@ class CSSSupportsRule final : public CSSGroupingRule {
 
   String cssText() const override;
 
-  String conditionText() const;
-
-  DEFINE_INLINE_VIRTUAL_TRACE() { CSSGroupingRule::trace(visitor); }

[foolip, 2016/10/18 10:38:33]

I think this should move into CSSConditionRule instead.

-
  private:
   CSSSupportsRule(StyleRuleSupports*, CSSStyleSheet*);