Revert of Change the update_client task runner behavior to continue on shutdown.

chrome/browser/component_updater/chrome_component_updater_configurator.cc

Index: chrome/browser/component_updater/chrome_component_updater_configurator.cc
diff --git a/chrome/browser/component_updater/chrome_component_updater_configurator.cc b/chrome/browser/component_updater/chrome_component_updater_configurator.cc
index eb0d7830daa6ae7eba44d13489f310cd92bc524c..5b6cebf6ffa277aa40279b9e2b1ab9250421a33a 100644
--- a/chrome/browser/component_updater/chrome_component_updater_configurator.cc
+++ b/chrome/browser/component_updater/chrome_component_updater_configurator.cc
@@ -123,16 +123,12 @@
   return configurator_impl_.UseBackgroundDownloader();
 }
 
-// Returns a task runner to run blocking tasks. The task runner continues to run
-// after the browser shuts down, until the OS terminates the process. This
-// imposes certain requirements for the code using the task runner, such as
-// not accessing any global browser state while the code is running.
 scoped_refptr<base::SequencedTaskRunner>
 ChromeConfigurator::GetSequencedTaskRunner() const {
   return content::BrowserThread::GetBlockingPool()
       ->GetSequencedTaskRunnerWithShutdownBehavior(
           content::BrowserThread::GetBlockingPool()->GetSequenceToken(),
-          base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 }
 
 }  // namespace