Check and canonicalize CSS selectors before registering PageStateMatchers.

chrome/common/extensions/api/test.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": "test",
     "description": "none",
     "functions": [
       {
@@ skipping 212 matching lines @@
         "nocompile": true,
         "parameters": [
           {"type": "function", "name": "fn"},
           {
             "type": "object",
             "name": "self",
             "additionalProperties": {"type": "any"},
             "optional": true
           },
           {"type": "array", "items": {"type": "any"}, "name": "args"},
-          {"type": "string", "name": "message", "optional": true}
+          {"type": "any", "name": "message", "optional": true,

[not at google - send to devlin, 2013/08/29 15:20:25]

instead:

{"choices": [ {"type": "string"}, {"isInstanceOf": "RegExp"} ], "name":
"message", "optional": true }

i.e. choices.

[Jeffrey Yasskin, 2013/08/29 21:46:43]

More "isInstanceOf". Thanks!

I still had to specify type:object, and that meant I needed to relax a
restriction in model.py.

+           "description":
+           "A string or RegExp that must match the exception's message"}

[not at google - send to devlin, 2013/08/29 15:20:25]

indentation here looks weird; it looks like we don't stick to 80 characters in
schema files.

[Jeffrey Yasskin, 2013/08/29 21:46:43]

'k. I've removed the description again now that the machine-readable data
captures the restrictions.

         ]
       },
       {
         "name": "callback",
         "type": "function",
         "nocompile": true,
         "parameters": [
           {"type": "function", "name": "func", "optional": true},
           {"type": "string", "name": "expectedError", "optional": true}
         ]
@@ skipping 79 matching lines @@
             "properties": {
               "data": { "type": "string", "description": "Additional information." },
               "lastMessage": { "type": "boolean", "description": "True if this was the last message for this test" }
             }
           }
         ]
       }
     ]
   }
 ]