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

base/threading/thread_perftest.cc

Index: base/threading/thread_perftest.cc
diff --git a/base/threading/thread_perftest.cc b/base/threading/thread_perftest.cc
index ef4e8f7158a9e689ad000ebe789f07a369f6d249..32b4289673c1926042135e98227eaad65c7f8e26 100644
--- a/base/threading/thread_perftest.cc
+++ b/base/threading/thread_perftest.cc
@@ -67,8 +67,8 @@ class ThreadPerfTest : public testing::Test {
                              WaitableEvent::InitialState::NOT_SIGNALED);
     base::ThreadTicks ticks;
     thread.task_runner()->PostTask(
-        FROM_HERE, base::Bind(&ThreadPerfTest::TimeOnThread,
-                              base::Unretained(this), &ticks, &done));
+        FROM_HERE, base::BindOnce(&ThreadPerfTest::TimeOnThread,
+                                  base::Unretained(this), &ticks, &done));
     done.Wait();
     return ticks;
   }
@@ -138,8 +138,8 @@ class TaskPerfTest : public ThreadPerfTest {
       return;
     }
     NextThread(hops)->task_runner()->PostTask(
-        FROM_HERE, base::Bind(&ThreadPerfTest::PingPong, base::Unretained(this),
-                              hops - 1));
+        FROM_HERE, base::BindOnce(&ThreadPerfTest::PingPong,
+                                  base::Unretained(this), hops - 1));
   }
 };
 
@@ -210,8 +210,8 @@ class EventPerfTest : public ThreadPerfTest {
     remaining_hops_ = hops;
     for (size_t i = 0; i < threads_.size(); i++) {
       threads_[i]->task_runner()->PostTask(
-          FROM_HERE, base::Bind(&EventPerfTest::WaitAndSignalOnThread,
-                                base::Unretained(this), i));
+          FROM_HERE, base::BindOnce(&EventPerfTest::WaitAndSignalOnThread,
+                                    base::Unretained(this), i));
     }
 
     // Kick off the Signal ping-ponging.