CSSMediaRule and CSSSupportsRule inherit from CSSConditionRule

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

 /* Copyright (C) 2012 Motorola Mobility Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above
  *    copyright notice, this list of conditions and the following disclaimer in
@@ skipping 18 matching lines @@
 #include "core/css/CSSSupportsRule.h"
 
 #include "core/css/CSSRule.h"
 #include "core/css/StyleRule.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 CSSSupportsRule::CSSSupportsRule(StyleRuleSupports* supportsRule,
                                  CSSStyleSheet* parent)
-    : CSSGroupingRule(supportsRule, parent) {}
+    : CSSConditionRule(supportsRule, parent) {}
 
 String CSSSupportsRule::cssText() const {
   StringBuilder result;
 
   result.append("@supports ");
   result.append(conditionText());
   result.append(" {\n");
   appendCSSTextForItems(result);
   result.append('}');
 
   return result.toString();
 }
 
-String CSSSupportsRule::conditionText() const {
-  return toStyleRuleSupports(m_groupRule.get())->conditionText();
-}
-
 }  // namespace blink