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

Source/WebKit/chromium/public/WebInputElement.h

Index: Source/WebKit/chromium/public/WebInputElement.h
diff --git a/Source/WebKit/chromium/public/WebInputElement.h b/Source/WebKit/chromium/public/WebInputElement.h
index 69f28be98b061c5c17344802fdda9773cf7e97a5..e0fa1a3df3522ade1293669ff6ad8b40b3856aca 100644
--- a/Source/WebKit/chromium/public/WebInputElement.h
+++ b/Source/WebKit/chromium/public/WebInputElement.h
@@ -34,7 +34,10 @@
 #include "WebFormControlElement.h"
 
 #if WEBKIT_IMPLEMENTATION
-namespace WebCore { class HTMLInputElement; }
+namespace WebCore {
+class HTMLInputElement;
+template<typename T> class Handle;
+}
 #endif
 
 namespace WebKit {
@@ -114,9 +117,9 @@ namespace WebKit {
         WEBKIT_EXPORT WebElement decorationElementFor(WebTextFieldDecoratorClient*);
 
 #if WEBKIT_IMPLEMENTATION
-        WebInputElement(const WTF::PassRefPtr<WebCore::HTMLInputElement>&);
-        WebInputElement& operator=(const WTF::PassRefPtr<WebCore::HTMLInputElement>&);
-        operator WTF::PassRefPtr<WebCore::HTMLInputElement>() const;
+        WebInputElement(WebCore::Handle<WebCore::HTMLInputElement>);
+        WebInputElement& operator=(WebCore::Handle<WebCore::HTMLInputElement>);
+        operator WebCore::Handle<WebCore::HTMLInputElement>() const;
 #endif
     };