Bug 887334 - Push a JSContext in nsGlobalWindow::SecurityCheckURL. r=gabor

dom/base/nsGlobalWindow.cpp

@@ -10869,13 +10869,15 @@ nsGlobalWindow::BuildURIfromBase(const char *aURL, nsIURI **aBuiltURI,
 nsresult
 nsGlobalWindow::SecurityCheckURL(const char *aURL)
 {
-  JSContext       *cx;
+  JSContext       *cxUsed;
   bool             freePass;
   nsCOMPtr<nsIURI> uri;
 
-  if (NS_FAILED(BuildURIfromBase(aURL, getter_AddRefs(uri), &freePass, &cx)))
+  if (NS_FAILED(BuildURIfromBase(aURL, getter_AddRefs(uri), &freePass, &cxUsed)))
     return NS_ERROR_FAILURE;
 
+  AutoPushJSContext cx(cxUsed);
+
   if (!freePass && NS_FAILED(nsContentUtils::GetSecurityManager()->
         CheckLoadURIFromScript(cx, uri)))
     return NS_ERROR_FAILURE;