Use TaskScheduler instead of WorkerPool in xkb_keyboard_layout_engine.cc.

ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.cc

 // Copyright 2014 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 "ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h"
 
 #include <stddef.h>
 #include <xkbcommon/xkbcommon-names.h>
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/free_deleter.h"
 #include "base/single_thread_task_runner.h"
 #include "base/task_runner.h"
+#include "base/task_scheduler/post_task.h"
 #include "base/threading/thread_task_runner_handle.h"
-#include "base/threading/worker_pool.h"
 #include "build/build_config.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/dom/dom_code.h"
 #include "ui/events/keycodes/dom/dom_key.h"
 #include "ui/events/keycodes/dom/keycode_converter.h"
 #include "ui/events/keycodes/keyboard_code_conversion.h"
 #include "ui/events/keycodes/keyboard_code_conversion_xkb.h"
 
 namespace ui {
 
@@ skipping 647 matching lines @@
 #if defined(OS_CHROMEOS)
   current_layout_name_ = layout_name;
   for (const auto& entry : xkb_keymaps_) {
     if (entry.layout_name == layout_name) {
       SetKeymap(entry.keymap);
       return true;
     }
   }
   LoadKeymapCallback reply_callback = base::Bind(
       &XkbKeyboardLayoutEngine::OnKeymapLoaded, weak_ptr_factory_.GetWeakPtr());
-  base::WorkerPool::PostTask(
-      FROM_HERE,
+  base::PostTaskWithTraits(
+      FROM_HERE, base::TaskTraits()
+                     .WithShutdownBehavior(
+                         base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
+                     .MayBlock(),
       base::Bind(&LoadKeymap, layout_name, base::ThreadTaskRunnerHandle::Get(),
-                 reply_callback),
-      true);
+                 reply_callback));
   return true;
 #else
   // Required by ozone-wayland (at least) for non ChromeOS builds. See
   // http://xkbcommon.org/doc/current/md_doc_quick-guide.html for further info.
   xkb_keymap* keymap = xkb_keymap_new_from_string(
       xkb_context_.get(), layout_name.c_str(), XKB_KEYMAP_FORMAT_TEXT_V1,
       XKB_KEYMAP_COMPILE_NO_FLAGS);
   if (!keymap)
     return false;
   SetKeymap(keymap);
@@ skipping 268 matching lines @@
       close_index = layout_name.size();
     *layout_variant = layout_name.substr(parentheses_index + 1,
                                          close_index - parentheses_index - 1);
   } else if (dash_index != std::string::npos) {
     *layout_id = layout_name.substr(0, dash_index);
     *layout_variant = layout_name.substr(dash_index + 1);
   }
 }
 
 }  // namespace ui