Fix the documentation and add Device.deviceName in sessions API.

chrome/common/extensions/api/sessions.json

 // Copyright 2013 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": "sessions",
     "description": "Use the <code>chrome.sessions</code> API to query and restore tabs and windows from a browsing session.",
     "types": [
       {
@@ skipping 15 matching lines @@
         "properties": {
           "lastModified": {"type": "integer", "description": "The time when the window or tab was closed or modified, represented in milliseconds since the epoch."},
           "tab": {"$ref": "tabs.Tab", "optional": true, "description": "The $(ref:tabs.Tab), if this entry describes a tab. Either this or $(ref:sessions.Session.window) will be set."},
           "window": {"$ref": "windows.Window", "optional": true, "description": "The $(ref:windows.Window), if this entry describes a window. Either this or $(ref:sessions.Session.tab) will be set."}
         }
       },
       {
         "id": "Device",
         "type": "object",
         "properties": {
-          "info": {"type": "string", "description": "Represents all information about a foreign device."},
+          "info": {"type": "string", "nodoc": true},
+          "deviceName": {"type": "string", "description": "The name of the foreign device."},
           "sessions": {"type": "array", "items": {"$ref": "Session"}, "description": "A list of open window sessions for the foreign device, sorted from most recently to least recently modified session."}
         }
       }
     ],
     "functions": [
       {
         "name": "getRecentlyClosed",
         "type": "function",
         "description": "Gets the list of recently closed tabs and/or windows.",
         "parameters": [
           {
             "$ref": "Filter",
             "name": "filter",
             "optional": true
           },
           {
             "type": "function",
             "name": "callback",
             "parameters": [
               {
-                "name": "sessions", "type": "array", "items": { "$ref": "Session" }, "description": "The list of closed entries in reverse order that they were closed (the most recently closed tab or window will be at index <code>0</code>).The entries may contain either tabs or windows."
+                "name": "sessions", "type": "array", "items": { "$ref": "Session" }, "description": "The list of closed entries in reverse order that they were closed (the most recently closed tab or window will be at index <code>0</code>). The entries may contain either tabs or windows."
               }
             ]
           }
         ]
       },
       {
         "name": "getDevices",
         "type": "function",
         "description": "Retrieves all devices with synced sessions.",
         "parameters": [
@@ skipping 47 matching lines @@
       }
     ],
     "properties": {
       "MAX_SESSION_RESULTS": {
         "value": 25,
         "description": "The maximum number of $(ref:sessions.Session) that will be included in a requested list."
       }
     }
   }
 ]