Tests: Simplify SequencedWorkerPoolOwner, call Shutdown on destructor.

components/rlz/rlz_tracker_unittest.cc

Index: components/rlz/rlz_tracker_unittest.cc
diff --git a/components/rlz/rlz_tracker_unittest.cc b/components/rlz/rlz_tracker_unittest.cc
index eb33d891b612ffaefd8741d981f8ecde2455d4cc..ba505eef4126f275ebdd1dcc20d0e173fd2123cd 100644
--- a/components/rlz/rlz_tracker_unittest.cc
+++ b/components/rlz/rlz_tracker_unittest.cc
@@ -8,8 +8,8 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/sequenced_worker_pool_owner.h"
 #include "base/thread_task_runner_handle.h"
-#include "base/threading/sequenced_worker_pool.h"
 #include "base/time/time.h"
 #include "components/rlz/rlz_tracker_delegate.h"
 #include "net/url_request/url_request_test_util.h"
@@ -30,12 +30,10 @@ namespace {
 class TestRLZTrackerDelegate : public RLZTrackerDelegate {
  public:
   TestRLZTrackerDelegate()
-      : worker_pool_(new base::SequencedWorkerPool(1, "TestRLZTracker")),
+      : worker_pool_owner_(1, "TestRLZTracker"),
         request_context_getter_(new net::TestURLRequestContextGetter(
             base::ThreadTaskRunnerHandle::Get())) {}
 
-  ~TestRLZTrackerDelegate() override { worker_pool_->Shutdown(); }
-
   void set_brand(const char* brand) { brand_override_ = brand; }
 
   void set_reactivation_brand(const char* reactivation_brand) {
@@ -68,7 +66,7 @@ class TestRLZTrackerDelegate : public RLZTrackerDelegate {
   bool IsOnUIThread() override { return true; }
 
   base::SequencedWorkerPool* GetBlockingPool() override {
-    return worker_pool_.get();
+    return worker_pool_owner_.pool().get();
   }
 
   net::URLRequestContextGetter* GetRequestContext() override {
@@ -108,7 +106,7 @@ class TestRLZTrackerDelegate : public RLZTrackerDelegate {
   }
 
  private:
-  scoped_refptr<base::SequencedWorkerPool> worker_pool_;
+  base::SequencedWorkerPoolOwner worker_pool_owner_;
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
 
   std::string brand_override_;