Rewrite base::Bind to base::BindOnce with base_bind_rewriters in //chrome/browser/sync

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

 // Copyright (c) 2014 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/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 38 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SingleClientDirectorySyncTest);
 };
 
 void SignalEvent(base::WaitableEvent* e) {
   e->Signal();
 }
 
 bool WaitForExistingTasksOnLoop(base::MessageLoop* loop) {
   base::WaitableEvent e(base::WaitableEvent::ResetPolicy::MANUAL,
                         base::WaitableEvent::InitialState::NOT_SIGNALED);
-  loop->task_runner()->PostTask(FROM_HERE, base::Bind(&SignalEvent, &e));
+  loop->task_runner()->PostTask(FROM_HERE, base::BindOnce(&SignalEvent, &e));
   // Timeout stolen from StatusChangeChecker::GetTimeoutDuration().
   return e.TimedWait(base::TimeDelta::FromSeconds(45));
 }
 
 // A status change checker that waits for an unrecoverable sync error to occur.
 class SyncUnrecoverableErrorChecker : public SingleClientStatusChangeChecker {
  public:
   explicit SyncUnrecoverableErrorChecker(
       browser_sync::ProfileSyncService* service)
       : SingleClientStatusChangeChecker(service) {}
@@ skipping 67 matching lines @@
   ASSERT_TRUE(SyncUnrecoverableErrorChecker(sync_service).Wait());
   ASSERT_TRUE(sync_service->HasUnrecoverableError());
 
   // Wait until the sync loop has processed any existing tasks and see that the
   // directory no longer exists.
   ASSERT_TRUE(WaitForExistingTasksOnLoop(sync_loop));
   ASSERT_FALSE(FolderContainsFiles(directory_path));
 }
 
 }  // namespace