TaskScheduler: Bump thread priority during shutdown.

base/task_scheduler/task_tracker.cc

Index: base/task_scheduler/task_tracker.cc
diff --git a/base/task_scheduler/task_tracker.cc b/base/task_scheduler/task_tracker.cc
index 8817baa04701088ece63b91005c68fe19ddca6e3..4c0b3f3edc4d94dc5f34c4a51b7f10622a82cb37 100644
--- a/base/task_scheduler/task_tracker.cc
+++ b/base/task_scheduler/task_tracker.cc
@@ -219,11 +219,19 @@ bool TaskTracker::IsShutdownComplete() const {
   return shutdown_event_ && shutdown_event_->IsSignaled();
 }
 
-bool TaskTracker::IsShuttingDownForTesting() const {
+bool TaskTracker::IsShutdownInProgress() const {
   AutoSchedulerLock auto_lock(shutdown_lock_);
   return shutdown_event_ && !shutdown_event_->IsSignaled();
 }
 
+void TaskTracker::SetIsShutdownInProgressForTesting() {
+  AutoSchedulerLock auto_lock(shutdown_lock_);
+  DCHECK(!shutdown_event_);
+  shutdown_event_.reset(
+      new WaitableEvent(WaitableEvent::ResetPolicy::MANUAL,

[robliao, 2016/07/19 22:41:28]

Unify this event creation with the one in Shutdown()

[fdoray, 2016/07/20 18:22:21]

n/a

+                        WaitableEvent::InitialState::NOT_SIGNALED));
+}
+
 bool TaskTracker::BeforePostTask(TaskShutdownBehavior shutdown_behavior) {
   if (shutdown_behavior == TaskShutdownBehavior::BLOCK_SHUTDOWN) {
     // BLOCK_SHUTDOWN tasks block shutdown between the moment they are posted