Make all extension api types fully qualified.

chrome/common/extensions/api/proxy.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": "proxy",
     "dependencies": [ "types" ],
     "types": [
       {
@@ skipping 39 matching lines @@
           "mode": {
             "type": "string",
             "enum": ["direct", "auto_detect", "pac_script", "fixed_servers", "system"],
             "description": "'direct' = Never use a proxy<br>'auto_detect' = Auto detect proxy settings<br>'pac_script' = Use specified PAC script<br>'fixed_servers' = Manually specify proxy servers<br>'system' = Use system proxy settings"
           }
         }
       }
     ],
     "properties": {
       "settings": {
-        "$ref": "ChromeSetting",
+        "$ref": "types.ChromeSetting",
         "description": "Proxy settings to be used. The value of this setting is a ProxyConfig object.",
         "value": [
           "proxy",
           {"$ref": "ProxyConfig"}
         ]
       }
     },
     "events": [
       {
         "name": "onProxyError",
@@ skipping 16 matching lines @@
                 "type": "string",
                 "description": "Additional details about the error such as a JavaScript runtime error."
               }
             }
           }
         ]
       }
     ]
   }
 ]