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

chrome/common/extensions/api/sessions.json

Index: chrome/common/extensions/api/sessions.json
diff --git a/chrome/common/extensions/api/sessions.json b/chrome/common/extensions/api/sessions.json
index 9362c4cca234f68903f972ff88d6815abf02be94..81f41b598060be1b183847e1d0c81371dddac80c 100644
--- a/chrome/common/extensions/api/sessions.json
+++ b/chrome/common/extensions/api/sessions.json
@@ -33,7 +33,8 @@
         "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": {"$ref": "Session"}, "description": "A list of open window sessions for the foreign device, sorted from most recently to least recently modified session."}
         }
       }
@@ -54,7 +55,7 @@
             "name": "callback",
             "parameters": [
               {
-                "name": "sessions", "type": "array", "items": { "$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."
               }
             ]
           }