Move isAutofilled and setAutofilled from HTMLInputElement to HTMLFormControlElement

public/web/WebFormControlElement.h

Index: public/web/WebFormControlElement.h
diff --git a/public/web/WebFormControlElement.h b/public/web/WebFormControlElement.h
index a70d36500133623a6c06e88ea8ee67925848821b..00f784b7773f663f817d52a4f11965cb1796d561 100644
--- a/public/web/WebFormControlElement.h
+++ b/public/web/WebFormControlElement.h
@@ -61,6 +61,9 @@ public:
 
     BLINK_EXPORT void dispatchFormControlChangeEvent();
 
+    BLINK_EXPORT bool isAutofilled() const;
+    BLINK_EXPORT void setAutofilled(bool);
+
     // Returns the name that should be used for the specified |element| when
     // storing autofill data.  This is either the field name or its id, an empty
     // string if it has no name and no id.