Add integraton test for sync backup/rollback.

chrome/browser/sync/test/integration/sync_exponential_backoff_test.cc

 // Copyright 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.
 
 #include "base/bind.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/test/integration/bookmarks_helper.h"
 #include "chrome/browser/sync/test/integration/retry_verifier.h"
 #include "chrome/browser/sync/test/integration/single_client_status_change_checker.h"
@@ skipping 49 matching lines @@
   // related bookkeeping information for verification.
   RetryVerifier retry_verifier_;
 
   DISALLOW_COPY_AND_ASSIGN(ExponentialBackoffChecker);
 };
 
 IN_PROC_BROWSER_TEST_F(SyncExponentialBackoffTest, OfflineToOnline) {
   ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
 
   // Add an item and ensure that sync is successful.
-  ASSERT_TRUE(AddFolder(0, 0, L"folder1"));
+  ASSERT_TRUE(AddFolder(0, 0, "folder1"));
   ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService((0))));
 
   // Trigger a network error at the client side.
   DisableNetwork(GetProfile(0));
 
   // Add a new item to trigger another sync cycle.
-  ASSERT_TRUE(AddFolder(0, 0, L"folder2"));
+  ASSERT_TRUE(AddFolder(0, 0, "folder2"));
 
   // Verify that the client goes into exponential backoff while it is unable to
   // reach the sync server.
   ExponentialBackoffChecker exponential_backoff_checker(
       GetSyncService((0)));
   exponential_backoff_checker.Wait();
   ASSERT_FALSE(exponential_backoff_checker.TimedOut());
 
   // Recover from the network error.
   EnableNetwork(GetProfile(0));
 
   // Verify that sync was able to recover.
   ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService((0))));
   ASSERT_TRUE(ModelMatchesVerifier(0));
 }
 
 IN_PROC_BROWSER_TEST_F(SyncExponentialBackoffTest, TransientErrorTest) {
   ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
 
   // Add an item and ensure that sync is successful.
-  ASSERT_TRUE(AddFolder(0, 0, L"folder1"));
+  ASSERT_TRUE(AddFolder(0, 0, "folder1"));
   ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService((0))));
 
   // Trigger a transient error on the server.
   TriggerTransientError();
 
   // Add a new item to trigger another sync cycle.
-  ASSERT_TRUE(AddFolder(0, 0, L"folder2"));
+  ASSERT_TRUE(AddFolder(0, 0, "folder2"));
 
   // Verify that the client goes into exponential backoff while it is unable to
   // reach the sync server.
   ExponentialBackoffChecker exponential_backoff_checker(
       GetSyncService((0)));
   exponential_backoff_checker.Wait();
   ASSERT_FALSE(exponential_backoff_checker.TimedOut());
 }
 
 }  // namespace