Update to latest versions of API declarations

etc/api/oauth2/v2/oauth2-api.json

@@ -1,11 +1,11 @@
 {
  "kind": "discovery#restDescription",
- "etag": "\"YWOzh2SDasdU84ArJnpYek-OMdg/BzEfukeh3bFCumL8KphVZA4lHuM\"",
+ "etag": "\"J3WqvAcMk4eQjJXvfSI4Yr8VouA/xO_Fr6wYeMztTgddj-Dn9icCcBM\"",
  "discoveryVersion": "v1",
  "id": "oauth2:v2",
  "name": "oauth2",
  "version": "v2",
- "revision": "20170921",
+ "revision": "20180823",
  "title": "Google OAuth2 API",
  "description": "Obtains end-user authorization grants for use with other Google APIs.",
  "ownerDomain": "google.com",
@@ -57,12 +57,12 @@
   },
   "quotaUser": {
    "type": "string",
-   "description": "Available to use for quota purposes for server-side applications. Can be any arbitrary string assigned to a user, but should not exceed 40 characters. Overrides userIp if both are provided.",
+   "description": "An opaque string that represents a user for quota purposes. Must not exceed 40 characters.",
    "location": "query"
   },
   "userIp": {
    "type": "string",
-   "description": "IP address of the site where the request originates. Use this if you want to enforce per-user limits.",
+   "description": "Deprecated. Please use quotaUser instead.",
    "location": "query"
   }
  },