gdata: Apply correct mount label when mounting archives in GData

chrome/common/extensions/api/fileBrowserPrivate.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":"fileBrowserPrivate",
     "nodoc": "true",
     "types": [
       {
@@ skipping 646 matching lines @@
           {
             "name": "mountType",
             "type": "string",
             "enum": ["device", "file", "network", "gdata"],
             "description": "Mount point type. 'file' for compressed files"
           },
           {
             "name": "options",
             "type": "object",
             "description": "Name/value pairs for source specific options",
             "optional": true

[tbarzic, 2012/04/27 05:44:21]

since callback is not optional, I'd remove this one too

[hshi, 2012/04/27 18:48:56]

Done.

+          },
+          {
+            "name": "callback",
+            "type": "function",
+            "parameters": [
+              {
+                "name": "sourcePath",
+                "type": "string",
+                "description": "Source path of the mount."
+              }
+            ]
           }
         ]
       },
       {
         "name": "removeMount",
         "description": "Unmounts a mounted resource.",
         "parameters": [
           {
             "name": "mountPath",
             "type": "string",
@@ skipping 220 matching lines @@
           {
             "$ref": "FileWatchEvent",
             "name": "event",
             "description": "File watch event information."
           }
         ]
       }
     ]
   }
 ]