TaskScheduler: Bump thread priority during shutdown.

base/task_scheduler/task_tracker.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/task_scheduler/task_tracker.h"
 
 #include <limits>
 
 #include "base/atomicops.h"
 #include "base/callback.h"
@@ skipping 201 matching lines @@
   }
 
   AfterRunTask(shutdown_behavior);
 }
 
 bool TaskTracker::IsShutdownComplete() const {
   AutoSchedulerLock auto_lock(shutdown_lock_);
   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
     // and the moment they complete their execution.
     const bool shutdown_started = state_->IncrementNumTasksBlockingShutdown();
 
     if (shutdown_started) {
       AutoSchedulerLock auto_lock(shutdown_lock_);
 
       // A BLOCK_SHUTDOWN task posted after shutdown has completed is an
@@ skipping 81 matching lines @@
 
   // This method can only be called after shutdown has started.
   DCHECK(state_->HasShutdownStarted());
   DCHECK(shutdown_event_);
 
   shutdown_event_->Signal();
 }
 
 }  // namespace internal
 }  // namespace base