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

base/threading/post_task_and_reply_impl_unittest.cc

 // Copyright 2016 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/post_task_and_reply_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 60 matching lines @@
   scoped_refptr<TestSimpleTaskRunner> reply_runner(new TestSimpleTaskRunner);
   ThreadTaskRunnerHandle task_runner_handle(reply_runner);
 
   testing::StrictMock<MockObject> mock_object;
   bool delete_flag = false;
 
   EXPECT_TRUE(
       PostTaskAndReplyTaskRunner(post_runner.get())
           .PostTaskAndReply(
               FROM_HERE,
-              Bind(&MockObject::Task, Unretained(&mock_object),
-                   make_scoped_refptr(new ObjectToDelete(&delete_flag))),
-              Bind(&MockObject::Reply, Unretained(&mock_object))));
+              BindOnce(&MockObject::Task, Unretained(&mock_object),
+                       make_scoped_refptr(new ObjectToDelete(&delete_flag))),
+              BindOnce(&MockObject::Reply, Unretained(&mock_object))));
 
   // Expect the task to be posted to |post_runner|.
   EXPECT_TRUE(post_runner->HasPendingTask());
   EXPECT_FALSE(reply_runner->HasPendingTask());
   EXPECT_FALSE(delete_flag);
 
   EXPECT_CALL(mock_object, Task(_));
   post_runner->RunUntilIdle();
   testing::Mock::VerifyAndClear(&mock_object);
 
   // |task| should have been deleted right after being run.
   EXPECT_TRUE(delete_flag);
 
   // Expect the reply to be posted to |reply_runner|.
   EXPECT_FALSE(post_runner->HasPendingTask());
   EXPECT_TRUE(reply_runner->HasPendingTask());
 
   EXPECT_CALL(mock_object, Reply());
   reply_runner->RunUntilIdle();
   testing::Mock::VerifyAndClear(&mock_object);
   EXPECT_TRUE(delete_flag);
 
   // Expect no pending task in |post_runner| and |reply_runner|.
   EXPECT_FALSE(post_runner->HasPendingTask());
   EXPECT_FALSE(reply_runner->HasPendingTask());
 }
 
 }  // namespace internal
 }  // namespace base