OpenItem now posts its task with CONTINUE_ON_SHUTDOWN semantic.

chrome/browser/platform_util.cc

Index: chrome/browser/platform_util.cc
diff --git a/chrome/browser/platform_util.cc b/chrome/browser/platform_util.cc
index 5cd2e45ef73213007c86668bb94730bee4517008..fa7cc9c351b65c8dbe9fa3a47d61f75da623a7a5 100644
--- a/chrome/browser/platform_util.cc
+++ b/chrome/browser/platform_util.cc
@@ -7,6 +7,7 @@
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
+#include "chrome/browser/browser_hangs_experiment.h"
 #include "chrome/browser/platform_util_internal.h"
 #include "content/public/browser/browser_thread.h"
 
@@ -57,9 +58,14 @@ void OpenItem(Profile* profile,
               OpenItemType item_type,
               const OpenOperationCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  BrowserThread::PostBlockingPoolTask(
+  base::SequencedWorkerPool::WorkerShutdown shutdown_mode =
+      IsBrowserHangsExperimentEnabled()
+          ? base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN
+          : base::SequencedWorkerPool::SKIP_ON_SHUTDOWN;
+  BrowserThread::GetBlockingPool()->PostWorkerTaskWithShutdownBehavior(
       FROM_HERE, base::Bind(&VerifyAndOpenItemOnBlockingThread, full_path,
-                            item_type, callback));
+                            item_type, callback),
+      shutdown_mode);
 }
 
 }  // namespace platform_util