Eliminate task runner injection from the configurator.

The new task scheduler API makes it possible to simplify the 
configurator and avoid injecting task runners.

Bug: 740992
Change-Id: Iaabdc498993745372cee47193f16f1df4d09f7a2
Reviewed-on: https://chromium-review.googlesource.com/582030
Reviewed-by: David Roger <[email protected]>
Reviewed-by: Joshua Pawlicki <[email protected]>
Reviewed-by: Devlin <[email protected]>
Commit-Queue: Sorin Jianu <[email protected]>
Cr-Commit-Position: refs/heads/master@{#489528}
diff --git a/components/component_updater/default_component_installer_unittest.cc b/components/component_updater/default_component_installer_unittest.cc
index cd2fff2..4fa8646 100644
--- a/components/component_updater/default_component_installer_unittest.cc
+++ b/components/component_updater/default_component_installer_unittest.cc
@@ -167,24 +167,17 @@
   const scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_ =
       base::ThreadTaskRunnerHandle::Get();
   base::RunLoop runloop_;
-  base::Closure quit_closure_;
+  base::Closure quit_closure_ = runloop_.QuitClosure();
 
-  scoped_refptr<TestConfigurator> config_;
-  scoped_refptr<MockUpdateClient> update_client_;
+  scoped_refptr<TestConfigurator> config_ =
+      base::MakeRefCounted<TestConfigurator>();
+  scoped_refptr<MockUpdateClient> update_client_ =
+      base::MakeRefCounted<MockUpdateClient>();
   std::unique_ptr<ComponentUpdateService> component_updater_;
   ComponentUnpacker::Result result_;
 };
 
-DefaultComponentInstallerTest::DefaultComponentInstallerTest()
-    : scoped_task_environment_(
-          base::test::ScopedTaskEnvironment::MainThreadType::UI) {
-  quit_closure_ = runloop_.QuitClosure();
-
-  config_ = base::MakeRefCounted<TestConfigurator>(
-      base::CreateSequencedTaskRunnerWithTraits({base::MayBlock()}),
-      base::ThreadTaskRunnerHandle::Get());
-
-  update_client_ = base::MakeRefCounted<MockUpdateClient>();
+DefaultComponentInstallerTest::DefaultComponentInstallerTest() {
   EXPECT_CALL(update_client(), AddObserver(_)).Times(1);
   component_updater_ =
       base::MakeUnique<CrxUpdateService>(config_, update_client_);