[oilpan] Completely move HTMLFormControlElement's hierarchy to the managed heap

Source/core/html/CheckboxInputType.h

Index: Source/core/html/CheckboxInputType.h
diff --git a/Source/core/html/CheckboxInputType.h b/Source/core/html/CheckboxInputType.h
index a4b770112732727a14fc04eca4e72762ce17b217..101f88be0bb855e7367326336303a5ae5c2c4031 100644
--- a/Source/core/html/CheckboxInputType.h
+++ b/Source/core/html/CheckboxInputType.h
@@ -37,10 +37,10 @@ namespace WebCore {
 
 class CheckboxInputType : public BaseCheckableInputType {
 public:
-    static PassOwnPtr<InputType> create(HTMLInputElement*);
+    static PassOwnPtr<InputType> create(Handle<HTMLInputElement>);
 
 private:
-    CheckboxInputType(HTMLInputElement* element) : BaseCheckableInputType(element) { }
+    CheckboxInputType(Handle<HTMLInputElement> element) : BaseCheckableInputType(element) { }
     virtual const AtomicString& formControlType() const OVERRIDE;
     virtual bool valueMissing(const String&) const OVERRIDE;
     virtual String valueMissingText() const OVERRIDE;