Add GetChangelist operation for Drive V2.

chrome/browser/chromeos/gdata/gdata_documents_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_GDATA_GDATA_DOCUMENTS_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_DOCUMENTS_SERVICE_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 74 matching lines @@
   // string is passed, |directory_resource_id| is ignored.
   //
   // Upon completion, invokes |callback| with results on the calling thread.
   // TODO(satorux): Refactor this function: crbug.com/128746
   virtual void GetDocuments(const GURL& feed_url,
                             int start_changestamp,
                             const std::string& search_query,
                             const std::string& directory_resource_id,
                             const GetDataCallback& callback) = 0;
 
+  // Fetches a changelist from |url| with |start_changestamp|, using Drive V2
+  // API. If this URL is empty the call will use the default URL. Specify |url|
+  // when pagenated request should be issued.
+  // |start_changestamp| specifies the starting point of change list or 0 if
+  // all changes are necessary.
+  // Upon completion, invokes |callback| with results on calling thread.
+  virtual void GetChangelist(const GURL& url,
+                             int64 start_changestamp,
+                             const GetDataCallback& callback) = 0;
+
   // Fetches single entry metadata from server. The entry's resource id equals
   // |resource_id|.
   // Upon completion, invokes |callback| with results on the calling thread.
   virtual void GetDocumentEntry(const std::string& resource_id,
                                 const GetDataCallback& callback) = 0;
 
   // Gets the account metadata from the server using the default account
   // metadata URL. Upon completion, invokes |callback| with results on the
   // calling thread.
   virtual void GetAccountMetadata(const GetDataCallback& callback) = 0;
@@ skipping 107 matching lines @@
   // DocumentsServiceInterface Overrides
   virtual void Initialize(Profile* profile) OVERRIDE;
   virtual GDataOperationRegistry* operation_registry() const OVERRIDE;
   virtual void CancelAll() OVERRIDE;
   virtual void Authenticate(const AuthStatusCallback& callback) OVERRIDE;
   virtual void GetDocuments(const GURL& feed_url,
                             int start_changestamp,
                             const std::string& search_query,
                             const std::string& directory_resource_id,
                             const GetDataCallback& callback) OVERRIDE;
+  virtual void GetChangelist(const GURL& url,
+                             int64 start_changestamp,
+                             const GetDataCallback& callback) OVERRIDE;
   virtual void GetDocumentEntry(const std::string& resource_id,
                                 const GetDataCallback& callback) OVERRIDE;
 
   virtual void GetAccountMetadata(const GetDataCallback& callback) OVERRIDE;
   virtual void GetAboutResource(const GetDataCallback& callback) OVERRIDE;
   virtual void GetApplicationList(const GetDataCallback& callback) OVERRIDE;
   virtual void DeleteDocument(const GURL& document_url,
                               const EntryActionCallback& callback) OVERRIDE;
   virtual void DownloadDocument(
       const FilePath& virtual_path,
@@ skipping 39 matching lines @@
   Profile* profile_;
 
   scoped_ptr<GDataOperationRunner> runner_;
 
   DISALLOW_COPY_AND_ASSIGN(DocumentsService);
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_DOCUMENTS_SERVICE_H_