Have HTMLFrameOwnerElement / SubframeLoadingDisabler deal with references

Source/core/html/HTMLObjectElement.cpp

Index: Source/core/html/HTMLObjectElement.cpp
diff --git a/Source/core/html/HTMLObjectElement.cpp b/Source/core/html/HTMLObjectElement.cpp
index b336370eb2793954efeeb68add51e3a4f5c97b33..b4bb9b462cf8c0f377a2b08f4c27de37b05cb105 100644
--- a/Source/core/html/HTMLObjectElement.cpp
+++ b/Source/core/html/HTMLObjectElement.cpp
@@ -275,7 +275,7 @@ void HTMLObjectElement::updateWidget(PluginCreationOption pluginCreationOption)
     // FIXME: I'm not sure it's ever possible to get into updateWidget during a
     // removal, but just in case we should avoid loading the frame to prevent
     // security bugs.
-    if (!SubframeLoadingDisabler::canLoadFrame(this))
+    if (!SubframeLoadingDisabler::canLoadFrame(*this))
         return;
 
     String url = this->url();