Minor cleanups to includes and fwd decls in core/css/resolver

Source/core/css/resolver/ScopedStyleResolver.h

Index: Source/core/css/resolver/ScopedStyleResolver.h
diff --git a/Source/core/css/resolver/ScopedStyleResolver.h b/Source/core/css/resolver/ScopedStyleResolver.h
index 7a28798d04a873a1d31d924a7b9876c387511f10..57d503ea0d2607269c8b3cafe0e937f6408e2846 100644
--- a/Source/core/css/resolver/ScopedStyleResolver.h
+++ b/Source/core/css/resolver/ScopedStyleResolver.h
@@ -29,19 +29,19 @@
 
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/RuleSet.h"
-#include "core/css/SiblingTraversalStrategies.h"
+#include "core/dom/ContainerNode.h"
+#include "core/dom/Element.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
-class ContainerNode;
 class ElementRuleCollector;
 class MediaQueryEvaluator;
 class PageRuleCollector;
-class ScopedStyleResolver;
 class ShadowRoot;
 class StyleSheetContents;