Move Declarative Web Request API out of experimental and make it a feature

chrome/common/extensions/docs/js/api_page_generator.js

 // 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.
 
 /**
  * @fileoverview This file is the controller for generating extension
  * doc pages.
  *
  * It expects to have available via XHR (relative path):
  *   1) API_TEMPLATE which is the main template for the api pages.
@@ skipping 12 matching lines @@
   '../api/alarms.json',  // autogenerated
   '../api/bookmarks.json',
   '../api/browserAction.json',
   '../api/browsingData.json',
   '../api/chromeAuthPrivate.json',
   '../api/chromeosInfoPrivate.json',
   '../api/contentSettings.json',
   '../api/contextMenus.json',
   '../api/cookies.json',
   '../api/debugger.json',
+  '../api/declarativeWebRequest.json',
   '../api/devtools.json',
   '../api/experimental.accessibility.json',
   '../api/experimental.app.json',
   '../api/experimental.bookmarkManager.json',
   '../api/experimental.downloads.json',
   '../api/experimental.fontSettings.json',
   '../api/experimental.identity.json',
   '../api/experimental.infobars.json',
   '../api/experimental.input.ui.json',
   '../api/experimental.input.virtualKeyboard.json',
   '../api/experimental.keybinding.json',
   '../api/experimental.offscreenTabs.json',
   '../api/experimental.processes.json',
   '../api/experimental.rlz.json',
   '../api/experimental.runtime.json',
   '../api/experimental.speechInput.json',
-  '../api/experimental.webRequest.json',
   '../api/extension.json',
   '../api/fileBrowserHandler.json',
   '../api/fileBrowserPrivate.json',
   '../api/history.json',
   '../api/i18n.json',
   '../api/idle.json',
   '../api/input.ime.json',
   '../api/inputMethodPrivate.json',
   '../api/managedModePrivate.json',
   '../api/management.json',
@@ skipping 679 matching lines @@
   }
   if (a.name > b.name) {
     return 1;
   }
   return 0;
 }
 
 function disableDocs(obj) {
   return !!obj.nodoc || !!obj.internal;
 }