Lazily load extension API schemas

chrome/common/extensions/api/script_badge.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": "scriptBadge",
-    "dependencies": [ "tabs" ],
     "functions": [
       {
         "name": "setPopup",
         "type": "function",
         "description": "Sets the html document to be opened as a popup when the user clicks on the script badge's icon.",
         "parameters": [
           {
             "name": "details",
             "type": "object",
             "properties": {
@@ skipping 61 matching lines @@
         "parameters": [
           {
             "name": "tab",
             "$ref": "tabs.Tab"
           }
         ]
       }
     ]
   }
 ]