More graceful shutdown for ArcSession.

chrome/browser/policy/policy_browsertest.cc

 // Copyright (c) 2012 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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <memory>
 #include <string>
@@ skipping 4172 matching lines @@
   }
 
   void SetUpInProcessBrowserTestFixture() override {
     PolicyTest::SetUpInProcessBrowserTestFixture();
     fake_session_manager_client_ = new chromeos::FakeSessionManagerClient;
     fake_session_manager_client_->set_arc_available(true);
     chromeos::DBusThreadManager::GetSetterForTesting()->SetSessionManagerClient(
         std::unique_ptr<chromeos::SessionManagerClient>(
             fake_session_manager_client_));
 
-    auto service = base::MakeUnique<arc::ArcBridgeServiceImpl>();
+    // Inject FakeArcSession here so blocking task runner is not needed.
+    auto service = base::MakeUnique<arc::ArcBridgeServiceImpl>(nullptr);
     service->SetArcSessionFactoryForTesting(
         base::Bind(arc::FakeArcSession::Create));
     arc::ArcServiceManager::SetArcBridgeServiceForTesting(std::move(service));
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     // ArcAuthService functionality is available only when Arc is enabled. Use
     // kEnableArc switch that activates it.
     command_line->AppendSwitch(chromeos::switches::kEnableArc);
   }
@@ skipping 285 matching lines @@
 
   SetEmptyPolicy();
   // Policy not set.
   CheckSystemTimezoneAutomaticDetectionPolicyUnset();
   EXPECT_TRUE(CheckResolveTimezoneByGeolocation(true, false));
   EXPECT_TRUE(manager->TimeZoneResolverShouldBeRunningForTests());
 }
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace policy