Forcibly clear worker ref counts on shutdown.

chrome/browser/safe_browsing/incident_reporting/state_store_unittest.cc

Index: chrome/browser/safe_browsing/incident_reporting/state_store_unittest.cc
diff --git a/chrome/browser/safe_browsing/incident_reporting/state_store_unittest.cc b/chrome/browser/safe_browsing/incident_reporting/state_store_unittest.cc
index 0018fa3baff5442656aedc1bc7e329cba1d57041..942c08e9313ed09a6aaec457a948391243281783 100644
--- a/chrome/browser/safe_browsing/incident_reporting/state_store_unittest.cc
+++ b/chrome/browser/safe_browsing/incident_reporting/state_store_unittest.cc
@@ -25,6 +25,7 @@
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/syncable_prefs/pref_service_syncable.h"
 #include "components/syncable_prefs/pref_service_syncable_factory.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "extensions/browser/quota_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -73,11 +74,11 @@ class StateStoreTest : public PlatformStateStoreTestBase {
   StateStoreTest()
       : profile_(nullptr),
         task_runner_(new base::TestSimpleTaskRunner()),
-        thread_task_runner_handle_(task_runner_),
         profile_manager_(TestingBrowserProcess::GetGlobal()) {}
 
   void SetUp() override {
     PlatformStateStoreTestBase::SetUp();
+    base::MessageLoop::current()->SetTaskRunner(task_runner_);
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     ASSERT_TRUE(profile_manager_.SetUp());
     CreateProfile();
@@ -119,6 +120,7 @@ class StateStoreTest : public PlatformStateStoreTestBase {
 
   static const char kProfileName_[];
   static const TestData kTestData_[];
+  content::TestBrowserThreadBundle thread_bundle_;
   TestingProfile* profile_;
   scoped_refptr<base::TestSimpleTaskRunner> task_runner_;
 
@@ -130,7 +132,6 @@ class StateStoreTest : public PlatformStateStoreTestBase {
   extensions::QuotaService::ScopedDisablePurgeForTesting
       disable_purge_for_testing_;
   base::ScopedTempDir temp_dir_;
-  base::ThreadTaskRunnerHandle thread_task_runner_handle_;
   TestingProfileManager profile_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(StateStoreTest);