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

Source/WebKit/chromium/public/WebInputElement.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebInputElement_h
 #define WebInputElement_h
 
 #include "WebFormControlElement.h"
 
 #if WEBKIT_IMPLEMENTATION
-namespace WebCore { class HTMLInputElement; }
+namespace WebCore {
+class HTMLInputElement;
+template<typename T> class Handle;
+}
 #endif
 
 namespace WebKit {
 
     class WebNodeCollection;
     class WebTextFieldDecoratorClient;
 
     // Provides readonly access to some properties of a DOM input element node.
     class WebInputElement : public WebFormControlElement {
     public:
@@ skipping 59 matching lines @@
         WEBKIT_EXPORT void startSpeechInput();
         WEBKIT_EXPORT void stopSpeechInput();
 
         // Exposes the default value of the maxLength attribute.
         WEBKIT_EXPORT static int defaultMaxLength();
 
         // Return the decoration added by the specified decorator if one exists.
         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
     };
 
     WEBKIT_EXPORT WebInputElement* toWebInputElement(WebElement*);
 
     inline const WebInputElement* toWebInputElement(const WebElement* element)
     {
         return toWebInputElement(const_cast<WebElement*>(element));
     }
 
 } // namespace WebKit
 
 #endif