Add a UseCounter for WebKitCSSMatrix

Source/core/css/CSSMatrix.h

Index: Source/core/css/CSSMatrix.h
diff --git a/Source/core/css/CSSMatrix.h b/Source/core/css/CSSMatrix.h
index c6cf832f39b0a310d7da646c278270b11cfe429c..df29e7c5d42fb75329d6be83f057378ba12681e8 100644
--- a/Source/core/css/CSSMatrix.h
+++ b/Source/core/css/CSSMatrix.h
@@ -34,6 +34,7 @@
 namespace blink {
 
 class ExceptionState;
+class ExecutionContext;
 
 class CSSMatrix final : public RefCountedWillBeGarbageCollected<CSSMatrix>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
@@ -42,10 +43,7 @@ public:
     {
         return adoptRefWillBeNoop(new CSSMatrix(m));
     }
-    static PassRefPtrWillBeRawPtr<CSSMatrix> create(const String& s, ExceptionState& exceptionState)
-    {
-        return adoptRefWillBeNoop(new CSSMatrix(s, exceptionState));
-    }
+    static PassRefPtrWillBeRawPtr<CSSMatrix> create(ExecutionContext*, const String&, ExceptionState&);
 
     double a() const { return m_matrix.a(); }
     double b() const { return m_matrix.b(); }