Remove base::NonThreadSafe now that all users are gone!!

components/sync/driver/sync_stopped_reporter_unittest.cc

 // Copyright 2015 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 "components/sync/driver/sync_stopped_reporter.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/scoped_mock_time_message_loop_task_runner.h"
-#include "base/threading/non_thread_safe.h"
 #include "components/sync/protocol/sync.pb.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
 
 const char kTestURL[] = "http://chromium.org/test";
 const char kTestURLTrailingSlash[] = "http://chromium.org/test/";
@@ skipping 165 matching lines @@
 
   // Begin request.
   ssr.ReportSyncStopped(kAuthToken, kCacheGuid, kBirthday);
 
   // Trigger the timeout.
   ASSERT_TRUE(mock_main_runner->HasPendingTask());
   mock_main_runner->FastForwardUntilNoTasksRemain();
 }
 
 }  // namespace syncer