Rewrite base::Bind into base::BindOnce on trivial cases in base

base/test/launcher/unit_test_launcher.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/test/launcher/unit_test_launcher.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
@@ skipping 421 matching lines @@
   // due to a crash.
   DCHECK(tests_to_relaunch.empty());
 
   // There is only one test, we should have called back with its result.
   DCHECK(called_any_callbacks);
 
   // The temporary file's directory is also temporary.
   DeleteFile(callback_state.output_file.DirName(), true);
 
   ThreadTaskRunnerHandle::Get()->PostTask(
-      FROM_HERE, Bind(&RunUnitTestsSerially, callback_state.test_launcher,
-                      callback_state.platform_delegate, test_names,
-                      callback_state.launch_flags));
+      FROM_HERE, BindOnce(&RunUnitTestsSerially, callback_state.test_launcher,
+                          callback_state.platform_delegate, test_names,
+                          callback_state.launch_flags));
 }
 
 }  // namespace
 
 int LaunchUnitTests(int argc,
                     char** argv,
                     const RunTestSuiteCallback& run_test_suite) {
   CommandLine::Init(argc, argv);
   return LaunchUnitTestsInternal(
       run_test_suite,
@@ skipping 174 matching lines @@
   RunUnitTestsBatch(test_launcher, platform_delegate_, batch, launch_flags);
 
   return test_names.size();
 }
 
 size_t UnitTestLauncherDelegate::RetryTests(
     TestLauncher* test_launcher,
     const std::vector<std::string>& test_names) {
   ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
-      Bind(&RunUnitTestsSerially, test_launcher, platform_delegate_, test_names,
-           use_job_objects_ ? TestLauncher::USE_JOB_OBJECTS : 0));
+      BindOnce(&RunUnitTestsSerially, test_launcher, platform_delegate_,
+               test_names,
+               use_job_objects_ ? TestLauncher::USE_JOB_OBJECTS : 0));
   return test_names.size();
 }
 
 }  // namespace base