Extract LazyBackgroundTaskQueue from ExtensionSystem.

chrome/browser/signin/easy_unlock_app_manager_unittest.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/signin/easy_unlock_app_manager.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 281 matching lines @@
 
  private:
   // Initializes test extension system.
   extensions::ExtensionSystem* SetUpExtensionSystem() {
     extensions::TestExtensionSystem* test_extension_system =
         static_cast<extensions::TestExtensionSystem*>(
             extensions::ExtensionSystem::Get(&profile_));
     extension_service_ = test_extension_system->CreateExtensionService(
         &command_line_, base::FilePath() /* install_directory */,
         false /* autoupdate_enabled */);
-    test_extension_system->CreateLazyBackgroundTaskQueue();
 
     extensions::ProcessManagerFactory::GetInstance()->SetTestingFactory(
         &profile_, &CreateTestProcessManager);
 
     scoped_ptr<extensions::EventRouter> event_router(new TestEventRouter(
         &profile_, extensions::ExtensionPrefs::Get(&profile_),
         &event_consumer_));
     event_router_ = event_router.get();
     test_extension_system->SetEventRouter(event_router.Pass());
 
@@ skipping 298 matching lines @@
       extension_misc::kEasyUnlockAppId);
   app_manager_->DisableAppIfLoaded();
 
   ASSERT_EQ(0u, event_consumer_.auth_attempted_count());
 
   EXPECT_FALSE(app_manager_->SendAuthAttemptEvent());
   EXPECT_EQ(0u, event_consumer_.auth_attempted_count());
 }
 
 }  // namespace