Don't scope check in SelectorChecker.

sky/engine/core/css/resolver/MatchRequest.h

Index: sky/engine/core/css/resolver/MatchRequest.h
diff --git a/sky/engine/core/css/resolver/MatchRequest.h b/sky/engine/core/css/resolver/MatchRequest.h
index 05c2a4fb6d79bd94cc0b25385040a56b4bcb7509..e38dc00443e51d39206c158ecf259d99afe11237 100644
--- a/sky/engine/core/css/resolver/MatchRequest.h
+++ b/sky/engine/core/css/resolver/MatchRequest.h
@@ -28,14 +28,11 @@
 
 namespace blink {
 
-class ContainerNode;
-
 class MatchRequest {
     STACK_ALLOCATED();
 public:
-    MatchRequest(RuleSet* ruleSet, const ContainerNode* scope = 0, const CSSStyleSheet* cssSheet = 0, unsigned styleSheetIndex = 0)
+    MatchRequest(RuleSet* ruleSet, const CSSStyleSheet* cssSheet = 0, unsigned styleSheetIndex = 0)
         : ruleSet(ruleSet)
-        , scope(scope)
         , styleSheet(cssSheet)
         , styleSheetIndex(styleSheetIndex)
     {
@@ -45,7 +42,6 @@ public:
     }
 
     RawPtr<const RuleSet> ruleSet;
-    RawPtr<const ContainerNode> scope;
     RawPtr<const CSSStyleSheet> styleSheet;
     const unsigned styleSheetIndex;
 };