Ensure tests have an active task runner

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 <vector>
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor_table.h"
@@ skipping 34 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_;
   TestingProfile profile_;
   scoped_ptr<PredictorDatabase> db_;
-  base::MessageLoop loop_;
   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();
@@ skipping 162 matching lines @@
 
 TEST_F(AutocompleteActionPredictorTableReopenTest, DeleteRows) {
   TestDeleteRows();
 }
 
 TEST_F(AutocompleteActionPredictorTableReopenTest, DeleteAllRows) {
   TestDeleteAllRows();
 }
 
 }  // namespace predictors