Oilpan: Prepare to move FormController and DocumentState to Oilpan heap, and remove RefPtrs to HTML…

Source/core/html/forms/FormController.cpp

Index: Source/core/html/forms/FormController.cpp
diff --git a/Source/core/html/forms/FormController.cpp b/Source/core/html/forms/FormController.cpp
index d7c6b30c389f4df47053fee19b54b96ff01378ef..02dbdf8117072ffbf91c8db865ccdd0c290f3207 100644
--- a/Source/core/html/forms/FormController.cpp
+++ b/Source/core/html/forms/FormController.cpp
@@ -374,15 +374,20 @@ void FormKeyGenerator::willDeleteForm(HTMLFormElement* form)
 
 // ----------------------------------------------------------------------------
 
-PassRefPtr<DocumentState> DocumentState::create()
+PassRefPtrWillBeRawPtr<DocumentState> DocumentState::create()
 {
-    return adoptRef(new DocumentState);
+    return adoptRefWillBeNoop(new DocumentState);
 }
 
 DocumentState::~DocumentState()
 {
 }
 
+void DocumentState::trace(Visitor* visitor)
+{
+    visitor->trace(m_formControls);
+}
+
 void DocumentState::addControl(HTMLFormControlElementWithState* control)
 {
     ASSERT(!m_formControls.contains(control));
@@ -443,6 +448,11 @@ FormController::~FormController()
 {
 }
 
+void FormController::trace(Visitor* visitor)
+{
+    visitor->trace(m_documentState);
+}
+
 DocumentState* FormController::formElementsState() const
 {
     return m_documentState.get();