Let url filter test the scheme in urlContains/Equals/Prefix/Suffix criteria

chrome/common/extensions/api/events.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": "events",
     "internal": true,
     "unprivileged": true,
     "types": [
@@ skipping 238 matching lines @@
             "description": "Matches if the query segment of the URL starts with a specified string.",
             "optional": true
           },
           "querySuffix": {
             "type": "string",
             "description": "Matches if the query segment of the URL ends with a specified string.",
             "optional": true
           },
           "urlContains": {
             "type": "string",
-            "description": "Matches if the URL contains a specified string.",
+            "description": "Matches if the URL (without fragment identifier) contains a specified string. Port numbers are stripped from the URL if they match the default port number.",
             "optional": true
           },
           "urlEquals": {
             "type": "string",
-            "description": "Matches if the URL is equal to a specified string.",
+            "description": "Matches if the URL (without fragment identifier) is equal to a specified string. Port numbers are stripped from the URL if they match the default port number.",
             "optional": true
           },
           "urlPrefix": {
             "type": "string",
-            "description": "Matches if the URL starts with a specified string.",
+            "description": "Matches if the URL (without fragment identifier) starts with a specified string. Port numbers are stripped from the URL if they match the default port number.",
             "optional": true
           },
           "urlSuffix": {
             "type": "string",
-            "description": "Matches if the URL ends with a specified string.",
+            "description": "Matches if the URL (without fragment identifier) ends with a specified string. Port numbers are stripped from the URL if they match the default port number.",
             "optional": true
           },
           "schemes": {
             "type": "array",
             "description": "Matches if the scheme of the URL is equal to any of the schemes specified in the array.",
             "optional": true,
             "items": { "type": "string" }
           },
           "ports": {
             "type": "array",
             "description": "Matches if the port of the URL is contained in any of the specified port lists. For example <code>[80, 443, [1000, 1200]]</code> matches all requests on port 80, 443 and in the range 1000-1200.",
             "optional": true,
             "items": {
               "choices": [
                 {"type": "integer", "description": "A specific port."},
                 {"type": "array", "items": {"type": "integer"}, "description": "A pair of integers identiying the start and end (both inclusive) of a port range."}
               ]
             }
           }
         }
       }
     ]
   }
 ]