Display extension options in a WebUI overlay instead of in a new tab

chrome/common/extensions/api/_api_features.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.
 
 // This features file defines extension APIs implemented under src/chrome.
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 //
 // Note that specifying "web_page", "blessed_web_page", or "all" as a context
 // type will require manually updating chrome/renderer/resources/dispatcher.cc.
@@ skipping 195 matching lines @@
     "contexts": ["blessed_extension"]
   },
   "chromeosInfoPrivate": {
     "dependencies": ["permission:chromeosInfoPrivate"],
     "contexts": ["blessed_extension"]
   },
   "cloudPrintPrivate": {
     "dependencies": ["permission:cloudPrintPrivate"],
     "contexts": ["blessed_extension"]
   },
-  "commandLinePrivate": {
+  "commandLinePrivate": [{
     "dependencies": ["permission:commandLinePrivate"],
     "contexts": ["blessed_extension"]
-  },
+  }, {
+    "channel": "trunk",

[not at google - send to devlin, 2014/08/14 15:33:20]

Better make it stable.

[ericzeng, 2014/08/14 18:11:54]

Done.

+    "contexts": ["webui"],
+    "matches": ["chrome://extensions-frame/*", "chrome://extensions/*"]
+  }],
   "commands": {
     "dependencies": ["manifest:commands"],
     "contexts": ["blessed_extension"]
   },
   "contentSettings": {
     "dependencies": ["permission:contentSettings"],
     "contexts": ["blessed_extension"]
   },
   "contextMenus": {
     "dependencies": ["permission:contextMenus"],
@@ skipping 598 matching lines @@
     "internal": true,
     "channel": "stable",
     "dependencies": ["permission:webview"],
     "contexts": ["blessed_extension"]
   },
   "windows": {
     "dependencies": ["api:tabs"],
     "contexts": ["blessed_extension"]
   }
 }