Bug 1371657 - Ensure editing UI is hidden when disabling editing. r=masayuki

--HG--
extra : rebase_source : cf83e8ac6662d15d15ca986f709d89edc87af28e

editor/libeditor/HTMLEditor.cpp

@@ -173,6 +173,8 @@ HTMLEditor::~HTMLEditor()
   }
 
   RemoveEventListeners();
+
+  HideAnonymousEditingUIs();
 }
 
 void