Update doc for r368222: url/title field requires "tabs" permission to be

chrome/common/extensions/api/tabs.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": "tabs",
     "description": "Use the <code>chrome.tabs</code> API to interact with the browser's tab system. You can use this API to create, modify, and rearrange tabs in the browser.",
     "types": [
       { "id": "MutedInfoReason",
@@ skipping 446 matching lines @@
                 "description": "Whether the tabs are in the last focused window."
               },
               "status": {
                 "$ref": "TabStatus",
                 "optional": true,
                 "description": "Whether the tabs have completed loading."
               },
               "title": {
                 "type": "string",
                 "optional": true,
-                "description": "Match page titles against a pattern."
+                "description": "Match page titles against a pattern. Note that this property is ignored if the extension doesn't have the <code>\"tabs\"</code> permission."
               },
               "url": {
                 "choices": [
                   {"type": "string"},
                   {"type": "array", "items": {"type": "string"}}
                 ],
                 "optional": true,
-                "description": "Match tabs against one or more <a href='match_patterns'>URL patterns</a>. Note that fragment identifiers are not matched."
+                "description": "Match tabs against one or more <a href='match_patterns'>URL patterns</a>. Note that fragment identifiers are not matched. Note that this property is ignored if the extension doesn't have the <code>\"tabs\"</code> permission."
               },
               "windowId": {
                 "type": "integer",
                 "optional": true,
                 "minimum": -2,
                 "description": "The ID of the parent window, or $(ref:windows.WINDOW_ID_CURRENT) for the <a href='windows#current-window'>current window</a>."
               },
               "windowType": {
                 "$ref": "WindowType",
                 "optional": true,
@@ skipping 691 matching lines @@
             "tabId": {"type": "integer", "minimum": 0},
             "oldZoomFactor": {"type": "number"},
             "newZoomFactor": {"type": "number"},
             "zoomSettings": {"$ref": "ZoomSettings"}
           }
         }]
       }
     ]
   }
 ]