Revert of Add ScopedStubEnterpriseInstallAttributes for tests to set test install attributes.

chrome/browser/chromeos/policy/browser_policy_connector_chromeos.cc

 // Copyright 2014 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/chromeos/policy/browser_policy_connector_chromeos.h"
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/path_service.h"
@@ skipping 193 matching lines @@
   return app_pack_updater_.get();
 }
 
 void BrowserPolicyConnectorChromeOS::SetUserPolicyDelegate(
     ConfigurationPolicyProvider* user_policy_provider) {
   global_user_cloud_policy_provider_->SetDelegate(user_policy_provider);
 }
 
 void BrowserPolicyConnectorChromeOS::SetInstallAttributesForTesting(
     EnterpriseInstallAttributes* attributes) {
-  DCHECK((attributes == NULL) != (g_testing_install_attributes == NULL));
+  DCHECK(!g_testing_install_attributes);
   g_testing_install_attributes = attributes;
 }
 
 // static
 void BrowserPolicyConnectorChromeOS::RegisterPrefs(
     PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(
       prefs::kDevicePolicyRefreshRate,
       CloudPolicyRefreshScheduler::kDefaultRefreshDelayMs);
 }
@@ skipping 11 matching lines @@
   std::string timezone;
   if (chromeos::CrosSettings::Get()->GetString(chromeos::kSystemTimezonePolicy,
                                                &timezone) &&
       !timezone.empty()) {
     chromeos::system::TimezoneSettings::GetInstance()->SetTimezoneFromID(
         base::UTF8ToUTF16(timezone));
   }
 }
 
 }  // namespace policy