Cleaning up C++14 move into lambda TODOs.

Bug: webrtc:10945
Change-Id: I4d2f358b0e33b37e4b4f7bfcf3f6cd55e8d46bf9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153240
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29212}

rtc_base/task_utils/repeating_task_unittest.cc

diff --git a/rtc_base/task_utils/repeating_task_unittest.cc b/rtc_base/task_utils/repeating_task_unittest.cc
index 2532098..469ee31 100644
--- a/rtc_base/task_utils/repeating_task_unittest.cc
+++ b/rtc_base/task_utils/repeating_task_unittest.cc
@@ -60,18 +60,6 @@
  private:
   MockClosure* mock_;
 };
-
-// Helper closure class to stop repeating task on a task queue. This is
-// equivalent to [handle{move(handle)}] { handle.Stop(); } in c++14.
-class TaskHandleStopper {
- public:
-  explicit TaskHandleStopper(RepeatingTaskHandle handle)
-      : handle_(std::move(handle)) {}
-  void operator()() { handle_.Stop(); }
-
- private:
-  RepeatingTaskHandle handle_;
-};
 }  // namespace
 
 TEST(RepeatingTaskTest, TaskIsStoppedOnStop) {
@@ -91,7 +79,8 @@
   Sleep(kShortInterval * (kShortIntervalCount + kMargin));
   EXPECT_EQ(counter.load(), kShortIntervalCount);
 
-  task_queue.PostTask(TaskHandleStopper(std::move(handle)));
+  task_queue.PostTask(
+      [handle = std::move(handle)]() mutable { handle.Stop(); });
   // Sleep long enough that the task would run at least once more if not
   // stopped.
   Sleep(kLongInterval * 2);
@@ -144,7 +133,8 @@
   TaskQueueForTest task_queue("queue");
   auto handle = RepeatingTaskHandle::DelayedStart(
       task_queue.Get(), TimeDelta::ms(100), MoveOnlyClosure(&mock));
-  task_queue.PostTask(TaskHandleStopper(std::move(handle)));
+  task_queue.PostTask(
+      [handle = std::move(handle)]() mutable { handle.Stop(); });
   EXPECT_TRUE(done.Wait(kTimeout.ms()));
 }
 
@@ -156,7 +146,8 @@
   TaskQueueForTest task_queue("queue");
   auto handle =
       RepeatingTaskHandle::Start(task_queue.Get(), MoveOnlyClosure(&mock));
-  task_queue.PostTask(TaskHandleStopper(std::move(handle)));
+  task_queue.PostTask(
+      [handle = std::move(handle)]() mutable { handle.Stop(); });
   EXPECT_TRUE(done.Wait(kTimeout.ms()));
 }
 
@@ -223,9 +214,11 @@
   RepeatingTaskHandle handle;
   object->StartPeriodicTask(&handle, task_queue.Get());
   // Restart the task
-  task_queue.PostTask(TaskHandleStopper(std::move(handle)));
+  task_queue.PostTask(
+      [handle = std::move(handle)]() mutable { handle.Stop(); });
   object->StartPeriodicTask(&handle, task_queue.Get());
-  task_queue.PostTask(TaskHandleStopper(std::move(handle)));
+  task_queue.PostTask(
+      [handle = std::move(handle)]() mutable { handle.Stop(); });
   struct Destructor {
     void operator()() { object.reset(); }
     std::unique_ptr<ObjectOnTaskQueue> object;