Make the CSS interface members static

Source/core/css/DOMWindowCSS.cpp

Index: Source/core/css/DOMWindowCSS.cpp
diff --git a/Source/core/css/DOMWindowCSS.cpp b/Source/core/css/DOMWindowCSS.cpp
index c18b6e144b2479d2dc7177fe99b159b90bb70ae7..9f7831bdb141e4821da2907d1f3615d6c136b343 100644
--- a/Source/core/css/DOMWindowCSS.cpp
+++ b/Source/core/css/DOMWindowCSS.cpp
@@ -42,7 +42,7 @@ PassRefPtrWillBeRawPtr<DOMWindowCSS> DOMWindowCSS::create()
     return adoptRefWillBeNoop(new DOMWindowCSS());
 }
 
-bool DOMWindowCSS::supports(const String& property, const String& value) const
+bool DOMWindowCSS::supports(const String& property, const String& value)
 {
     CSSPropertyID unresolvedProperty = unresolvedCSSPropertyID(property);
     if (unresolvedProperty == CSSPropertyInvalid)
@@ -54,7 +54,7 @@ bool DOMWindowCSS::supports(const String& property, const String& value) const
     return CSSParser::parseValue(dummyStyle.get(), unresolvedProperty, value, false, HTMLStandardMode, 0);
 }
 
-bool DOMWindowCSS::supports(const String& conditionText) const
+bool DOMWindowCSS::supports(const String& conditionText)
 {
     return CSSParser::parseSupportsCondition(conditionText);
 }