sync: add a SyncSessionJobPurpose for clearing sync user data.

chrome/browser/sync/sessions/test_util.h

 // Copyright (c) 2011 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.
 //
 // Utils to simulate various outcomes of a sync session.
 #ifndef CHROME_BROWSER_SYNC_SESSIONS_TEST_UTIL_H_
 #define CHROME_BROWSER_SYNC_SESSIONS_TEST_UTIL_H_
 #pragma once
 
+#include "chrome/browser/sync/engine/syncer.h"
 #include "chrome/browser/sync/sessions/sync_session.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace browser_sync {
 namespace sessions {
 namespace test_util {
 
-void SimulateHasMoreToSync(sessions::SyncSession* session);
-void SimulateDownloadUpdatesFailed(sessions::SyncSession* session);
-void SimulateCommitFailed(sessions::SyncSession* session);
-void SimulateSuccess(sessions::SyncSession* session);
+void SimulateHasMoreToSync(sessions::SyncSession* session,
+                           SyncerStep begin, SyncerStep end);
+void SimulateDownloadUpdatesFailed(sessions::SyncSession* session,
+                                   SyncerStep begin, SyncerStep end);
+void SimulateCommitFailed(sessions::SyncSession* session,
+                          SyncerStep begin, SyncerStep end);
+void SimulateSuccess(sessions::SyncSession* session,
+                     SyncerStep begin, SyncerStep end);
 void SimulateThrottledImpl(sessions::SyncSession* session,
     const base::TimeDelta& delta);
 void SimulatePollIntervalUpdateImpl(sessions::SyncSession* session,
     const base::TimeDelta& new_poll);
 
 ACTION_P(SimulateThrottled, throttle) {
   SimulateThrottledImpl(arg0, throttle);
 }
 
 ACTION_P(SimulatePollIntervalUpdate, poll) {
   SimulatePollIntervalUpdateImpl(arg0, poll);
 }
 
 }  // namespace test_util
 }  // namespace sessions
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_SESSIONS_TEST_UTIL_H_