Revert 136296 - Make all extension api types fully qualified.

chrome/common/extensions/api/experimental.infobars.json

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [
   {
     "namespace": "experimental.infobars",
     "dependencies": [ "windows" ],
     "types": [],
     "functions": [
@@ skipping 22 matching lines @@
                 "maximum": 72
               }
             }
           },
           {
             "type": "function",
             "name": "callback",
             "optional": true,
             "parameters": [
               {
-                "name": "window", "$ref": "windows.Window", "description": "Contains details about the window in which the infobar was created."
+                "name": "window", "$ref": "Window", "description": "Contains details about the window in which the infobar was created."
               }
             ]
           }
         ]
       }
     ]
   }
 ]