Add URL generator / json parser for getting start_page_token of changes.

google_apis/drive/drive_api_url_generator.h

 // Copyright (c) 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.
 
 #ifndef GOOGLE_APIS_DRIVE_DRIVE_API_URL_GENERATOR_H_
 #define GOOGLE_APIS_DRIVE_DRIVE_API_URL_GENERATOR_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 62 matching lines @@
   // Returns a URL to delete a resource with the given |file_id|.
   GURL GetFilesDeleteUrl(const std::string& file_id) const;
 
   // Returns a URL to trash a resource with the given |file_id|.
   GURL GetFilesTrashUrl(const std::string& file_id) const;
 
   // Returns a URL to invoke "TeamDrives: list" method.
   GURL GetTeamDriveListUrl(int max_results,
                            const std::string& page_token) const;
 
+  // Returns a URL to get the starting pageToken for listing future changes.
+  GURL GetChangesGetStartPageTokenUrl(const std::string& team_drive_id) const;
+
   // Returns a URL to fetch a list of changes.
   GURL GetChangesListUrl(bool include_deleted,
                          int max_results,
                          const std::string& page_token,
                          int64_t start_change_id,
                          const std::string& team_dirve_id) const;
 
   // Returns a URL to add a resource to a directory with |folder_id|.
   GURL GetChildrenInsertUrl(const std::string& folder_id) const;
 
@@ skipping 42 matching lines @@
   const GURL base_download_url_;
   const GURL base_thumbnail_url_;
   const bool enable_team_drives_;
 
   // This class is copyable hence no DISALLOW_COPY_AND_ASSIGN here.
 };
 
 }  // namespace google_apis
 
 #endif  // GOOGLE_APIS_DRIVE_DRIVE_API_URL_GENERATOR_H_