Make all extension api types fully qualified.

chrome/common/extensions/api/experimental.webRequest.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.webRequest",
     "types": [
       {
         "id": "RequestMatcher",
         "type": "object",
         "description": "Matches network events by various criteria.",
         "properties": {
           "url": {
-            "$ref": "UrlFilter",
+            "$ref": "experimental.declarative.UrlFilter",
             "description": "Matches if the condition of the UrlFilter are fulfilled for the URL of the request.",
             "optional": true
           },
           "resourceType": {
             "type": "array",
             "optional": true,
             "description": "Matches if the request type of a request is contained in the list. Requests that cannot match any of the types will be filtered out.",
             "items": { "type": "string", "enum": ["main_frame", "sub_frame", "stylesheet", "script", "image", "object", "xmlhttprequest", "other"] }
           },
           "instanceType": { "type": "string", "enum": ["experimental.webRequest.RequestMatcher"] }
@@ skipping 25 matching lines @@
         "options": {
           "supportsListeners": false,
           "supportsRules": true,
           "conditions": ["RequestMatcher"],
           "actions": ["CancelRequest", "RedirectRequest"]
         }
       }
     ]
   }
 ]