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

Source/WebKit/chromium/src/WebFormElement.cpp

Index: Source/WebKit/chromium/src/WebFormElement.cpp
diff --git a/Source/WebKit/chromium/src/WebFormElement.cpp b/Source/WebKit/chromium/src/WebFormElement.cpp
index 85341ba50bccb56823e67f8c309c2f49458d1689..1398ed8d40dfc2a2a18a6a597e45d629540b714f 100644
--- a/Source/WebKit/chromium/src/WebFormElement.cpp
+++ b/Source/WebKit/chromium/src/WebFormElement.cpp
@@ -87,19 +87,19 @@ void WebFormElement::getNamedElements(const WebString& name,
 void WebFormElement::getFormControlElements(WebVector<WebFormControlElement>& result) const
 {
     const HTMLFormElement* form = constUnwrap<HTMLFormElement>();
-    Vector<RefPtr<HTMLFormControlElement> > tempVector;
+    CollectionRoot<Vector<Member<HTMLFormControlElement> > > tempVector;
     // FIXME: We should move the for-loop condition into a variable instead of
     // re-evaluating size each time. Also, consider refactoring this code so that
     // we don't call form->associatedElements() multiple times.
     for (size_t i = 0; i < form->associatedElements().size(); i++) {
         if (!form->associatedElements()[i]->isFormControlElement())
             continue;
-        HTMLFormControlElement* element = static_cast<HTMLFormControlElement*>(form->associatedElements()[i]);
+        Handle<HTMLFormControlElement> element(static_cast<HTMLFormControlElement*>(form->associatedElements()[i]));
         if (element->hasLocalName(HTMLNames::inputTag)
             || element->hasLocalName(HTMLNames::selectTag))
-            tempVector.append(element);
+            tempVector->append(element);
     }
-    result.assign(tempVector);
+    result.assign(*tempVector);
 }
 
 void WebFormElement::finishRequestAutocomplete(WebFormElement::AutocompleteResult result)