Make the CSS interface members static

Source/core/css/DOMWindowCSS.h

Index: Source/core/css/DOMWindowCSS.h
diff --git a/Source/core/css/DOMWindowCSS.h b/Source/core/css/DOMWindowCSS.h
index b36ed5243de5e53e2be8aeb3ca697fb8fb71c254..0bedbe2b826a65f1340ff99dbdfc81d0bebd2c7f 100644
--- a/Source/core/css/DOMWindowCSS.h
+++ b/Source/core/css/DOMWindowCSS.h
@@ -41,10 +41,8 @@ namespace blink {
 class DOMWindowCSS : public RefCountedWillBeGarbageCollected<DOMWindowCSS>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<DOMWindowCSS> create();
-
-    bool supports(const String& property, const String& value) const;
-    bool supports(const String& conditionText) const;
+    static bool supports(const String& property, const String& value);
+    static bool supports(const String& conditionText);
 
     DEFINE_INLINE_TRACE() { }