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

Source/WebKit/chromium/public/WebSelectElement.h

Index: Source/WebKit/chromium/public/WebSelectElement.h
diff --git a/Source/WebKit/chromium/public/WebSelectElement.h b/Source/WebKit/chromium/public/WebSelectElement.h
index 63cd8f1f8e6c3ae7f43ef495f36e21426c3203ed..d4e631cbdacddf7f2999d0cf5bc4acf7313ada72 100644
--- a/Source/WebKit/chromium/public/WebSelectElement.h
+++ b/Source/WebKit/chromium/public/WebSelectElement.h
@@ -36,7 +36,10 @@
 #include "WebOptionElement.h"
 
 #if WEBKIT_IMPLEMENTATION
-namespace WebCore { class HTMLSelectElement; }
+namespace WebCore {
+class HTMLSelectElement;
+template<typename T> class Handle;
+}
 #endif
 
 namespace WebKit {
@@ -59,9 +62,9 @@ public:
     WEBKIT_EXPORT WebVector<WebElement> listItems() const;
 
 #if WEBKIT_IMPLEMENTATION
-    WebSelectElement(const WTF::PassRefPtr<WebCore::HTMLSelectElement>&);
-    WebSelectElement& operator=(const WTF::PassRefPtr<WebCore::HTMLSelectElement>&);
-    operator WTF::PassRefPtr<WebCore::HTMLSelectElement>() const;
+    WebSelectElement(WebCore::Handle<WebCore::HTMLSelectElement>);
+    WebSelectElement& operator=(WebCore::Handle<WebCore::HTMLSelectElement>);
+    operator WebCore::Handle<WebCore::HTMLSelectElement>() const;
 #endif
 };