Oilpan: Remove guardRef and guardDeref from TreeScope.

Source/core/html/HTMLInputElement.cpp

Index: Source/core/html/HTMLInputElement.cpp
diff --git a/Source/core/html/HTMLInputElement.cpp b/Source/core/html/HTMLInputElement.cpp
index 7952c58f83be743b8803e9610ed433ab59f45558..03bb788a82123d35f12d842f94d1dfe6c684e543 100644
--- a/Source/core/html/HTMLInputElement.cpp
+++ b/Source/core/html/HTMLInputElement.cpp
@@ -157,6 +157,7 @@ void HTMLInputElement::willAddFirstAuthorShadowRoot()
 
 HTMLInputElement::~HTMLInputElement()
 {
+#if !ENABLE(OILPAN)
     // Need to remove form association while this is still an HTMLInputElement
     // so that virtual functions are called correctly.
     setForm(0);

[haraken, 2014/04/25 14:30:32]

It's not trivial if we can remove setForm(0), but it looks OK. Notifications
dispatched in setForm(0) are just manipulating button groups, and we're no
longer interested in the button groups at this point where the document and the
HTMLInputElement are going to die together.

[Mads Ager (chromium), 2014/04/28 09:45:21]

Yes, exactly.

@@ -166,6 +167,7 @@ HTMLInputElement::~HTMLInputElement()
         document().formController().radioButtonGroupScope().removeButton(this);
     if (m_hasTouchEventHandler)
         document().didRemoveTouchEventHandler(this);
+#endif
 }
 
 const AtomicString& HTMLInputElement::name() const