Restrict chrome.runtime.setUninstallURL to http(s)

extensions/common/api/runtime.json

 // Copyright 2014 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.
 
 // Note: Many of these functions and events are implemented by hand and should
 // not elicit any code generation from the schema compiler. These items are
 // marked "nocompile."
 [
   {
     "namespace": "runtime",
@@ skipping 173 matching lines @@
         }
       },
       {
         "name": "setUninstallURL",
         "type": "function",
         "description": "Sets the URL to be visited upon uninstallation. This may be used to clean up server-side data, do analytics, and implement surveys. Maximum 255 characters.",
         "parameters": [
           {
             "type": "string",
             "name": "url",
-            "maxLength": 255
+            "maxLength": 255,
+            "description": "URL to be opened after the extension is uninstalled. This URL must have an http: or https: scheme. Set an empty string to not open a new tab upon uninstallation."
+          },
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "description": "Called when the uninstall URL is set. If the given URL is invalid, $(ref:runtime.lastError) will be set.",
+            "parameters": []
           }
         ]
       },
       {
         "name": "reload",
         "description": "Reloads the app or extension.",
         "type": "function",
         "parameters": []
       },
       {
@@ skipping 311 matching lines @@
           {
             "$ref": "OnRestartRequiredReason",
             "name": "reason",
             "description": "The reason that the event is being dispatched."
           }
         ]
       }
     ]
   }
 ]