Ensure tests have an active task runner

chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc

 // Copyright (c) 2013 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 <string>
 
 #include <vector>
 
 #include "base/guid.h"
-#include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
+#include "base/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api.h"
 #include "chrome/browser/extensions/extension_api_unittest.h"
 #include "chrome/browser/extensions/test_extension_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/sync/profile_sync_service_mock.h"
 #include "components/sync_driver/device_info.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "extensions/common/extension.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using sync_driver::DeviceInfo;
 using sync_driver::DeviceInfoTracker;
 using testing::Return;
 
 namespace extensions {
 
@@ skipping 35 matching lines @@
   void RemoveObserver(Observer* observer) override { NOTREACHED(); }
 
   void Add(const DeviceInfo* device) { devices_.push_back(device); }
 
  private:
   // DeviceInfo stored here are not owned.
   std::vector<const DeviceInfo*> devices_;
 };
 
 TEST(SignedInDevicesAPITest, GetSignedInDevices) {
+  content::TestBrowserThreadBundle thread_bundle;
   TestingProfile profile;
   MockDeviceInfoTracker device_tracker;
-  base::MessageLoop message_loop_;
-  TestExtensionPrefs extension_prefs(
-      message_loop_.message_loop_proxy().get());
+  TestExtensionPrefs extension_prefs(base::ThreadTaskRunnerHandle::Get().get());
 
   // Add a couple of devices and make sure we get back public ids for them.
   std::string extension_name = "test";
   scoped_refptr<Extension> extension_test =
       extension_prefs.AddExtension(extension_name);
 
   DeviceInfo device_info1(base::GenerateGUID(),
                           "abc Device",
                           "XYZ v1",
                           "XYZ SyncAgent v1",
@@ skipping 154 matching lines @@
       .WillOnce(Return(&device_tracker));
   EXPECT_CALL(*pss_mock, Shutdown());
 
   ScopedVector<DeviceInfo> output = GetAllSignedInDevices(
       extension()->id(), profile());
 
   EXPECT_TRUE(output.empty());
 }
 
 }  // namespace extensions