Forcibly clear worker ref counts on shutdown.

chrome/browser/predictors/autocomplete_action_predictor_table_unittest.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 <vector>
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor_table.h"
 #include "chrome/browser/predictors/predictor_database.h"
 #include "chrome/browser/predictors/predictor_database_factory.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "sql/statement.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::Time;
 using base::TimeDelta;
 using content::BrowserThread;
 using predictors::AutocompleteActionPredictorTable;
 
 namespace predictors {
@@ skipping 20 matching lines @@
   // Test functions that can be run against this text fixture or
   // AutocompleteActionPredictorTableReopenTest that inherits from this.
   void TestGetRow();
   void TestAddAndUpdateRows();
   void TestDeleteRows();
   void TestDeleteAllRows();
 
   AutocompleteActionPredictorTable::Rows test_db_;
 
  private:
-  base::MessageLoop loop_;
+  content::TestBrowserThreadBundle thread_bundle_;
   TestingProfile profile_;
   std::unique_ptr<PredictorDatabase> db_;
-  content::TestBrowserThread db_thread_;
 };
 
 class AutocompleteActionPredictorTableReopenTest
     : public AutocompleteActionPredictorTableTest {
  public:
   void SetUp() override {
     // By calling SetUp twice, we make sure that the table already exists for
     // this fixture.
     AutocompleteActionPredictorTableTest::SetUp();
     AutocompleteActionPredictorTableTest::TearDown();
     AutocompleteActionPredictorTableTest::SetUp();
   }
 };
 
-AutocompleteActionPredictorTableTest::AutocompleteActionPredictorTableTest()
-    : db_thread_(BrowserThread::DB, &loop_) {
-}
+AutocompleteActionPredictorTableTest::AutocompleteActionPredictorTableTest() {}
 
 AutocompleteActionPredictorTableTest::~AutocompleteActionPredictorTableTest() {
 }
 
 void AutocompleteActionPredictorTableTest::SetUp() {
   db_.reset(new PredictorDatabase(&profile_));
   base::RunLoop().RunUntilIdle();
 
   test_db_.push_back(AutocompleteActionPredictorTable::Row(
       "BD85DBA2-8C29-49F9-84AE-48E1E90880DF",
@@ skipping 144 matching lines @@
 
 TEST_F(AutocompleteActionPredictorTableReopenTest, DeleteRows) {
   TestDeleteRows();
 }
 
 TEST_F(AutocompleteActionPredictorTableReopenTest, DeleteAllRows) {
   TestDeleteAllRows();
 }
 
 }  // namespace predictors