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

Source/core/loader/FormSubmission.cpp

Index: Source/core/loader/FormSubmission.cpp
diff --git a/Source/core/loader/FormSubmission.cpp b/Source/core/loader/FormSubmission.cpp
index e3ba77e6f3d93cbb161fe7673e7c7de5ea148a2c..b781474ffb7a243915116fbce4df4cd505933e6a 100644
--- a/Source/core/loader/FormSubmission.cpp
+++ b/Source/core/loader/FormSubmission.cpp
@@ -141,11 +141,11 @@ PassRefPtr<FormSubmission> FormSubmission::create(HTMLFormElement* form, const A
 {
     ASSERT(form);
 
-    HTMLFormControlElement* submitButton = 0;
+    Handle<HTMLFormControlElement> submitButton;
     if (event && event->target()) {
         for (Node* node = event->target()->toNode(); node; node = node->parentNode()) {
             if (node->isElementNode() && toElement(node)->isFormControlElement()) {
-                submitButton = static_cast<HTMLFormControlElement*>(node);
+                submitButton = Handle<HTMLFormControlElement>(static_cast<HTMLFormControlElement*>(node));
                 break;
             }
         }
@@ -190,7 +190,7 @@ PassRefPtr<FormSubmission> FormSubmission::create(HTMLFormElement* form, const A
         if (!element->isDisabledFormControl())
             control->appendFormData(*domFormData, isMultiPartForm);
         if (element->hasLocalName(inputTag)) {
-            HTMLInputElement* input = static_cast<HTMLInputElement*>(control);
+            Handle<HTMLInputElement> input(static_cast<HTMLInputElement*>(control));
             if (input->isTextField()) {
                 formValues.append(pair<String, String>(input->name().string(), input->value()));
                 input->addSearchResult();