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

base/threading/sequenced_task_runner_handle_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 "base/threading/sequenced_task_runner_handle.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 23 matching lines @@
     ASSERT_TRUE(SequencedTaskRunnerHandle::IsSet());
     scoped_refptr<SequencedTaskRunner> task_runner =
         SequencedTaskRunnerHandle::Get();
     ASSERT_TRUE(task_runner);
 
     // Use SequenceCheckerImpl to make sure it's not a no-op in Release builds.
     std::unique_ptr<SequenceCheckerImpl> sequence_checker(
         new SequenceCheckerImpl);
     task_runner->PostTask(
         FROM_HERE,
-        base::Bind(&SequencedTaskRunnerHandleTest::CheckValidSequence,
-                   base::Passed(&sequence_checker), callback));
+        base::BindOnce(&SequencedTaskRunnerHandleTest::CheckValidSequence,
+                       base::Passed(&sequence_checker), callback));
   }
 
   // Verifies that there is no SequencedTaskRunnerHandle in the context it runs.
   // Runs |callback| when done.
   static void VerifyNoSequencedTaskRunner(const Closure& callback) {
     ASSERT_FALSE(SequencedTaskRunnerHandle::IsSet());
     callback.Run();
   }
 
  private:
@@ skipping 14 matching lines @@
 }
 
 TEST_F(SequencedTaskRunnerHandleTest, FromSequencedWorkerPoolTask) {
   // Wrap the SequencedWorkerPool to avoid leaks due to its asynchronous
   // destruction.
   SequencedWorkerPoolOwner owner(3, "Test");
   WaitableEvent event(WaitableEvent::ResetPolicy::AUTOMATIC,
                       WaitableEvent::InitialState::NOT_SIGNALED);
   owner.pool()->PostSequencedWorkerTask(
       owner.pool()->GetSequenceToken(), FROM_HERE,
-      base::Bind(
+      base::BindOnce(
           &SequencedTaskRunnerHandleTest::VerifyCurrentSequencedTaskRunner,
           base::Bind(&WaitableEvent::Signal, base::Unretained(&event))));
   event.Wait();
 }
 
 TEST_F(SequencedTaskRunnerHandleTest, NoHandleFromUnsequencedTask) {
   // Wrap the SequencedWorkerPool to avoid leaks due to its asynchronous
   // destruction.
   SequencedWorkerPoolOwner owner(3, "Test");
   WaitableEvent event(WaitableEvent::ResetPolicy::AUTOMATIC,
                       WaitableEvent::InitialState::NOT_SIGNALED);
   owner.pool()->PostWorkerTask(
       FROM_HERE,
-      base::Bind(
+      base::BindOnce(
           &SequencedTaskRunnerHandleTest::VerifyNoSequencedTaskRunner,
           base::Bind(&WaitableEvent::Signal, base::Unretained(&event))));
   event.Wait();
 }
 
 TEST(SequencedTaskRunnerHandleTestWithoutMessageLoop, FromHandleInScope) {
   scoped_refptr<SequencedTaskRunner> test_task_runner(new TestSimpleTaskRunner);
   EXPECT_FALSE(SequencedTaskRunnerHandle::IsSet());
   EXPECT_FALSE(ThreadTaskRunnerHandle::IsSet());
   {
     SequencedTaskRunnerHandle handle(test_task_runner);
     EXPECT_TRUE(SequencedTaskRunnerHandle::IsSet());
     EXPECT_FALSE(ThreadTaskRunnerHandle::IsSet());
     EXPECT_EQ(test_task_runner, SequencedTaskRunnerHandle::Get());
   }
   EXPECT_FALSE(SequencedTaskRunnerHandle::IsSet());
   EXPECT_FALSE(ThreadTaskRunnerHandle::IsSet());
 }
 
 }  // namespace
 }  // namespace base