CSSMediaRule and CSSSupportsRule inherit from CSSConditionRule

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

Index: third_party/WebKit/Source/core/css/CSSMediaRule.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSMediaRule.cpp b/third_party/WebKit/Source/core/css/CSSMediaRule.cpp
index fcc0e7763a5a0b81c40bbc05b13799241d02e3de..33c451d509354b32b76ad0407f8afaf7c1953f53 100644
--- a/third_party/WebKit/Source/core/css/CSSMediaRule.cpp
+++ b/third_party/WebKit/Source/core/css/CSSMediaRule.cpp
@@ -28,7 +28,7 @@
 namespace blink {
 
 CSSMediaRule::CSSMediaRule(StyleRuleMedia* mediaRule, CSSStyleSheet* parent)
-    : CSSGroupingRule(mediaRule, parent) {}
+    : CSSConditionRule(mediaRule, parent) {}
 
 CSSMediaRule::~CSSMediaRule() {}
 
@@ -49,6 +49,12 @@ String CSSMediaRule::cssText() const {
   return result.toString();
 }
 
+String CSSMediaRule::conditionText() const {
+  if (!mediaQueries())
+    return String();
+  return mediaQueries()->mediaText();

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

Ah, MediaList uses this interally, makes sense.

+}
+
 MediaList* CSSMediaRule::media() const {
   if (!mediaQueries())
     return nullptr;
@@ -59,7 +65,7 @@ MediaList* CSSMediaRule::media() const {
 }
 
 void CSSMediaRule::reattach(StyleRuleBase* rule) {
-  CSSGroupingRule::reattach(rule);
+  CSSConditionRule::reattach(rule);
   if (m_mediaCSSOMWrapper && mediaQueries())
     m_mediaCSSOMWrapper->reattach(mediaQueries());
 }