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

Source/WebKit/chromium/src/WebSelectElement.cpp

Index: Source/WebKit/chromium/src/WebSelectElement.cpp
diff --git a/Source/WebKit/chromium/src/WebSelectElement.cpp b/Source/WebKit/chromium/src/WebSelectElement.cpp
index 3bb1ba9df9b1db943a333a7039f3e4fcb82aa88b..4647c6e517782e00219c27ef931070f9efa0ccce 100644
--- a/Source/WebKit/chromium/src/WebSelectElement.cpp
+++ b/Source/WebKit/chromium/src/WebSelectElement.cpp
@@ -34,6 +34,7 @@
 #include "HTMLNames.h"
 #include "core/html/HTMLOptionElement.h"
 #include "core/html/HTMLSelectElement.h"
+#include "heap/Handle.h"
 #include <public/WebString.h>
 #include <wtf/PassRefPtr.h>
 
@@ -61,20 +62,20 @@ WebVector<WebElement> WebSelectElement::listItems() const
     return items;
 }
 
-WebSelectElement::WebSelectElement(const PassRefPtr<HTMLSelectElement>& elem)
+WebSelectElement::WebSelectElement(Handle<HTMLSelectElement> elem)
     : WebFormControlElement(elem)
 {
 }
 
-WebSelectElement& WebSelectElement::operator=(const PassRefPtr<HTMLSelectElement>& elem)
+WebSelectElement& WebSelectElement::operator=(Handle<HTMLSelectElement> elem)
 {
-    m_private = elem;
+    m_private = elem.passRefPtr();
     return *this;
 }
 
-WebSelectElement::operator PassRefPtr<HTMLSelectElement>() const
+WebSelectElement::operator Handle<HTMLSelectElement>() const
 {
-    return static_cast<HTMLSelectElement*>(m_private.get());
+    return Handle<HTMLSelectElement>(static_cast<HTMLSelectElement*>(m_private.get()));
 }
 
 } // namespace WebKit