Document and test case sensitivity in URL matcher attributes

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 173 matching lines @@
           "priority": {
             "type": "integer",
             "optional": true,
             "description": "Optional priority of this rule. Defaults to 100."
           }
         }
       },
       {
         "id": "UrlFilter",
         "type": "object",
-        "description": "Filters URLs for various criteria. See <a href='#filtered'>event filtering</a>.",
+        "description": "Filters URLs for various criteria. See <a href='#filtered'>event filtering</a>. All criteria are case sensitive.",
         "nocompile": true,
         "properties": {
           "hostContains": {
             "type": "string",
             "description": "Matches if the host name of the URL contains a specified string. To test whether a host name component has a prefix 'foo', use hostContains: '.foo'. This matches 'www.foobar.com' and 'foo.com', because an implicit dot is added at the beginning of the host name. Similarly, hostContains can be used to match against component suffix ('foo.') and to exactly match against components ('.foo.'). Suffix- and exact-matching for the last components need to be done separately using hostSuffix, because no implicit dot is added at the end of the host name.",
             "optional": true
           },
           "hostEquals": {
             "type": "string",
             "description": "Matches if the host name of the URL is equal to a specified string.",
@@ skipping 90 matching lines @@
                 {"type": "array", "items": {"type": "integer"}, "description": "A pair of integers identiying the start and end (both inclusive) of a port range."}
               ]
             }
           }
         }
       }
     ]
   }
 ]