Missed a small change in my last CL.

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "unprivileged": true,
     "types": [
       {
         "id": "MessageSender",
         "type": "object",
         "description": "An object containing information about the script context that sent a message or request.",
         "properties": {
@@ skipping 3945 matching lines @@
               "$ref": "SuggestResult"
             }
           }
         ]
       },
       {
         "name": "styleUrl",
         "type": "function",
         "description": "Constructor for the descriptionStyles parameter of the suggest callback. This style designates a region of text matching a URL or filename. A negative offset means the region will start at that many characters from the end of the description. If length is omitted, the region will apply for the rest of the description text.",
         "parameters": [
-           {"type": "integer", "name": "offset", "minimum": 0},
+           {"type": "integer", "name": "offset"},
            {"type": "integer", "name": "length", "minimum": 0, "optional": true}
         ]
       },
       {
         "name": "styleMatch",
         "type": "function",
         "description": "Constructor for the descriptionStyles parameter of the suggest callback. This style designates a region of text matching what the user typed. A negative offset means the region will start at that many characters from the end of the description. If length is omitted, the region will apply for the rest of the description text.",
         "parameters": [
-           {"type": "integer", "name": "offset", "minimum": 0},
+           {"type": "integer", "name": "offset"},
            {"type": "integer", "name": "length", "minimum": 0, "optional": true}
         ]
       },
       {
         "name": "styleDim",
         "type": "function",
         "description": "Constructor for the descriptionStyles parameter of the suggest callback. This style designates a region of dim helper text. A negative offset means the region will start at that many characters from the end of the description. If length is omitted, the region will apply for the rest of the description text.",
         "parameters": [
-           {"type": "integer", "name": "offset", "minimum": 0},
+           {"type": "integer", "name": "offset"},
            {"type": "integer", "name": "length", "minimum": 0, "optional": true}
         ]
       }
     ],
     "events": [
       {
         "name": "onInputStarted",
         "type": "function",
         "description": "User has started a keyword input session by typing the extension's keyword. This is guaranteed to be sent exactly once per input session, and before any onInputChanged events.",
         "parameters": []
@@ skipping 354 matching lines @@
                   "token": { "type": "string", "optional": true }
                 }
               }
             ]
           }
         ]
       }
     ]
   }
 ]