OpenItem now posts its task with CONTINUE_ON_SHUTDOWN semantic.

chrome/browser/platform_util.cc

 // Copyright 2015 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 "chrome/browser/platform_util.h"
 
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "chrome/browser/platform_util_internal.h"
+#include "chrome/common/chrome_features.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
 namespace platform_util {
 
 namespace {
 
 bool shell_operations_allowed = true;
 
@@ skipping 29 matching lines @@
   shell_operations_allowed = false;
 }
 
 }  // namespace internal
 
 void OpenItem(Profile* profile,
               const base::FilePath& full_path,
               OpenItemType item_type,
               const OpenOperationCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  BrowserThread::PostBlockingPoolTask(
+  base::SequencedWorkerPool::WorkerShutdown shutdown_mode =
+      base::FeatureList::IsEnabled(features::kBrowserHangFixesExperiment)
+          ? 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