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

Source/core/html/FormController.h

Index: Source/core/html/FormController.h
diff --git a/Source/core/html/FormController.h b/Source/core/html/FormController.h
index 551e058095f886c724560785493b6aa504ad587d..d7eae05338bff51311f319f5a12ecc99d49ba715 100644
--- a/Source/core/html/FormController.h
+++ b/Source/core/html/FormController.h
@@ -84,14 +84,14 @@ public:
 
     CheckedRadioButtons& checkedRadioButtons() { return m_checkedRadioButtons; }
     
-    void registerFormElementWithState(HTMLFormControlElementWithState* control) { m_formElementsWithState.add(control); }
-    void unregisterFormElementWithState(HTMLFormControlElementWithState* control) { m_formElementsWithState.remove(control); }
+    void registerFormElementWithState(Handle<HTMLFormControlElementWithState> control) { m_formElementsWithState.add(control.raw()); }
+    void unregisterFormElementWithState(Handle<HTMLFormControlElementWithState> control) { m_formElementsWithState.remove(control.raw()); }
     // This should be callled only by Document::formElementsState().
     Vector<String> formElementsState() const;
     // This should be callled only by Document::setStateForNewFormElements().
     void setStateForNewFormElements(const Vector<String>&);
     void willDeleteForm(HTMLFormElement*);
-    void restoreControlStateFor(HTMLFormControlElementWithState&);
+    void restoreControlStateFor(Handle<HTMLFormControlElementWithState>);
     void restoreControlStateIn(HTMLFormElement&);
 
     static Vector<String> getReferencedFilePaths(const Vector<String>& stateVector);
@@ -99,12 +99,13 @@ public:
     void clearWeakPointers(Visitor*);
 
 private:
+    // FIXME(oilpan): This should be a weak hash set on the heap.
     typedef ListHashSet<HTMLFormControlElementWithState*, 64> FormElementListHashSet;
     typedef HashMap<RefPtr<AtomicStringImpl>, OwnPtr<SavedFormState> > SavedFormStateMap;
 
     FormController();
     static PassOwnPtr<SavedFormStateMap> createSavedFormStateMap(const FormElementListHashSet&);
-    FormControlState takeStateForFormElement(const HTMLFormControlElementWithState&);
+    FormControlState takeStateForFormElement(Handle<const HTMLFormControlElementWithState>);
     static void formStatesFromStateVector(const Vector<String>&, SavedFormStateMap&);
 
     CheckedRadioButtons m_checkedRadioButtons;