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

Source/WebKit/chromium/src/WebFormControlElement.cpp

Index: Source/WebKit/chromium/src/WebFormControlElement.cpp
diff --git a/Source/WebKit/chromium/src/WebFormControlElement.cpp b/Source/WebKit/chromium/src/WebFormControlElement.cpp
index 595c2ae19254ac178aa65283743c5b22291fc27a..fe9a9eb33a39c6735cdf1324f7af141d42407ee9 100644
--- a/Source/WebKit/chromium/src/WebFormControlElement.cpp
+++ b/Source/WebKit/chromium/src/WebFormControlElement.cpp
@@ -33,6 +33,7 @@
 
 #include "core/html/HTMLFormControlElement.h"
 #include "core/html/HTMLFormElement.h"
+#include "heap/Handle.h"
 #include <wtf/PassRefPtr.h>
 
 using namespace WebCore;
@@ -82,20 +83,20 @@ WebFormElement WebFormControlElement::form() const
     return WebFormElement(constUnwrap<HTMLFormControlElement>()->form());
 }
 
-WebFormControlElement::WebFormControlElement(const PassRefPtr<HTMLFormControlElement>& elem)
-    : WebElement(elem)
+WebFormControlElement::WebFormControlElement(Handle<HTMLFormControlElement> elem)
+    : WebElement(elem.passRefPtr())
 {
 }
 
-WebFormControlElement& WebFormControlElement::operator=(const PassRefPtr<HTMLFormControlElement>& elem)
+WebFormControlElement& WebFormControlElement::operator=(Handle<HTMLFormControlElement> elem)
 {
-    m_private = elem;
+    m_private = elem.passRefPtr();
     return *this;
 }
 
-WebFormControlElement::operator PassRefPtr<HTMLFormControlElement>() const
+WebFormControlElement::operator Handle<HTMLFormControlElement>() const

[Vyacheslav Egorov (Google), 2013/07/18 16:50:08]

I wonder if we want to cast to Handle<T> not to Result<T>?

It seems more natural to cast to Result<T> as this is what we return (similar
how references counting returns PassRefPtr). 

[haraken, 2013/07/19 02:57:09]

I replaced the operator overloading with a normal method getValue().

 {
-    return static_cast<HTMLFormControlElement*>(m_private.get());
+    return Handle<HTMLFormControlElement>(static_cast<HTMLFormControlElement*>(m_private.get()));
 }
 
 } // namespace WebKit