TaskScheduler: Bump thread priority during shutdown.

base/task_scheduler/task_tracker_unittest.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 <stdint.h>
 
 #include <memory>
 #include <vector>
@@ skipping 114 matching lines @@
         TaskTraits().WithShutdownBehavior(shutdown_behavior), TimeDelta()));
   }
 
   // Calls tracker_->Shutdown() on a new thread. When this returns, Shutdown()
   // method has been entered on the new thread, but it hasn't necessarily
   // returned.
   void CallShutdownAsync() {
     ASSERT_FALSE(thread_calling_shutdown_);
     thread_calling_shutdown_.reset(new ThreadCallingShutdown(&tracker_));
     thread_calling_shutdown_->Start();
-    while (!tracker_.IsShuttingDownForTesting() &&
-           !tracker_.IsShutdownComplete()) {
+    while (!tracker_.HasShutdownStarted())
       PlatformThread::YieldCurrentThread();
-    }
   }
 
   void WaitForAsyncIsShutdownComplete() {
     ASSERT_TRUE(thread_calling_shutdown_);
     thread_calling_shutdown_->Join();
     EXPECT_TRUE(thread_calling_shutdown_->has_returned());
     EXPECT_TRUE(tracker_.IsShutdownComplete());
   }
 
   void VerifyAsyncShutdownInProgress() {
     ASSERT_TRUE(thread_calling_shutdown_);
     EXPECT_FALSE(thread_calling_shutdown_->has_returned());
+    EXPECT_TRUE(tracker_.HasShutdownStarted());
     EXPECT_FALSE(tracker_.IsShutdownComplete());
-    EXPECT_TRUE(tracker_.IsShuttingDownForTesting());
   }
 
   size_t NumTasksExecuted() {
     AutoSchedulerLock auto_lock(lock_);
     return num_tasks_executed_;
   }
 
   TaskTracker tracker_;
 
  private:
@@ skipping 433 matching lines @@
   VERIFY_ASYNC_SHUTDOWN_IN_PROGRESS();
 
   // Unblock shutdown by running |block_shutdown_task|.
   tracker_.RunTask(block_shutdown_task.get());
   EXPECT_EQ(kLoadTestNumIterations + 1, NumTasksExecuted());
   WAIT_FOR_ASYNC_SHUTDOWN_COMPLETED();
 }
 
 }  // namespace internal
 }  // namespace base