Fix TestBrowserThread destruction order in CrOS tests.

chrome/browser/signin/easy_unlock_service_unittest_chromeos.cc

 // Copyright 2015 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 "chrome/browser/signin/easy_unlock_service.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
@@ skipping 278 matching lines @@
 
     mock_user_manager_->AddUser(account_id);
     profile->get()->set_profile_name(account_id.GetUserEmail());
 
     SigninManagerBase* signin_manager =
         SigninManagerFactory::GetForProfile(profile->get());
     signin_manager->SetAuthenticatedAccountInfo(account_id.GetGaiaId(),
                                                 account_id.GetUserEmail());
   }
 
+ private:
+  // Must outlive TestingProfiles.
+  content::TestBrowserThreadBundle thread_bundle_;
+
  protected:
   std::unique_ptr<TestingProfile> profile_;
   std::unique_ptr<TestingProfile> secondary_profile_;
   chromeos::MockUserManager* mock_user_manager_;
 
  private:
-  content::TestBrowserThreadBundle thread_bundle_;
-
   chromeos::ScopedUserManagerEnabler scoped_user_manager_;
 
   FakePowerManagerClient* power_manager_client_;
 
   bool is_bluetooth_adapter_present_;
   scoped_refptr<testing::NiceMock<MockBluetoothAdapter>> mock_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockServiceTest);
 };
 
@@ skipping 67 matching lines @@
   EXPECT_EQ(AccountId::FromUserEmailGaiaId(kTestUserPrimary, kPrimaryGaiaId),
             EasyUnlockService::Get(profile_.get())->GetAccountId());
 
   SetUpSecondaryProfile();
   EXPECT_EQ(AccountId::FromUserEmailGaiaId(kTestUserSecondary,
                                            kSecondaryGaiaId),
             EasyUnlockService::Get(secondary_profile_.get())->GetAccountId());
 }
 
 }  // namespace