Use TaskScheduler in EnsureProcessTerminated().

base/process/kill_win.cc

Index: base/process/kill_win.cc
diff --git a/base/process/kill_win.cc b/base/process/kill_win.cc
index ecb08421cfa2309e455f428174b8112ed7891561..dff7ad0e814bf72d280522b6675743887797edbb 100644
--- a/base/process/kill_win.cc
+++ b/base/process/kill_win.cc
@@ -17,7 +17,7 @@
 #include "base/macros.h"
 #include "base/process/memory.h"
 #include "base/process/process_iterator.h"
-#include "base/threading/thread_task_runner_handle.h"
+#include "base/task_scheduler/post_task.h"
 #include "base/win/object_watcher.h"
 
 namespace base {
@@ -196,14 +196,15 @@ void EnsureProcessTerminated(Process process) {
   DCHECK(!process.is_current());
 
   // If already signaled, then we are done!
-  if (WaitForSingleObject(process.Handle(), 0) == WAIT_OBJECT_0) {
+  if (WaitForSingleObject(process.Handle(), 0) == WAIT_OBJECT_0)
     return;
-  }
 
-  ThreadTaskRunnerHandle::Get()->PostDelayedTask(
-      FROM_HERE, Bind(&TimerExpiredTask::TimedOut,
-                      Owned(new TimerExpiredTask(std::move(process)))),
-      TimeDelta::FromMilliseconds(kWaitInterval));
+  CreateTaskRunnerWithTraits(

[gab, 2016/12/22 20:23:02]

Should we add PostDelayedTaskWithTraits()?

[fdoray, 2017/01/06 17:36:48]

Done.

+      TaskTraits().WithPriority(TaskPriority::BACKGROUND))
+      ->PostDelayedTask(FROM_HERE,
+                        Bind(&TimerExpiredTask::TimedOut,
+                             Owned(new TimerExpiredTask(std::move(process)))),
+                        TimeDelta::FromMilliseconds(kWaitInterval));
 }
 
 }  // namespace base