Bug 1058980 - Disable external.addSearchEngine, external.AddSearchProvider in prerendering; r=jst

--HG--
extra : amend_source : 03cce38442166dbac7bd88d744d7c5a42a144ce3

dom/webidl/External.webidl

@@ -7,12 +7,12 @@
 [JSImplementation="@mozilla.org/sidebar;1"]
 interface External
 {
-  void AddSearchProvider(DOMString aDescriptionURL);
+  [UnsafeInPrerendering] void AddSearchProvider(DOMString aDescriptionURL);
   unsigned long IsSearchProviderInstalled(DOMString aSearchURL);
 };
 
 // Mozilla extension
 partial interface External {
-  void addSearchEngine(DOMString engineURL, DOMString iconURL,
-                       DOMString suggestedTitle, DOMString suggestedCategory);
+  [UnsafeInPrerendering] void addSearchEngine(DOMString engineURL, DOMString iconURL,
+                                              DOMString suggestedTitle, DOMString suggestedCategory);
 };