Have InputType factories take an HTMLInputElement reference in parameter

Source/core/html/forms/HiddenInputType.h

Index: Source/core/html/forms/HiddenInputType.h
diff --git a/Source/core/html/forms/HiddenInputType.h b/Source/core/html/forms/HiddenInputType.h
index 9f20f749fd8b29dc462ae61351a17a9162abafd0..a93b5c34fa73aca09d159cc2000a8c4ea4cc1755 100644
--- a/Source/core/html/forms/HiddenInputType.h
+++ b/Source/core/html/forms/HiddenInputType.h
@@ -37,10 +37,10 @@ namespace WebCore {
 
 class HiddenInputType : public InputType {
 public:
-    static PassRefPtr<InputType> create(HTMLInputElement*);
+    static PassRefPtr<InputType> create(HTMLInputElement&);
 
 private:
-    HiddenInputType(HTMLInputElement* element) : InputType(element) { }
+    HiddenInputType(HTMLInputElement& element) : InputType(element) { }
     virtual const AtomicString& formControlType() const OVERRIDE;
     virtual FormControlState saveFormControlState() const OVERRIDE;
     virtual void restoreFormControlState(const FormControlState&) OVERRIDE;