Fix official builders compile

chrome/browser/ui/webui/settings/metrics_reporting_handler_unittest.cc

 // Copyright 2016 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.
 
 #if defined(GOOGLE_CHROME_BUILD) && !defined(OS_CHROMEOS)
 
 #include "chrome/browser/ui/webui/settings/metrics_reporting_handler.h"
 
 #include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
 #include "base/values.h"
 #include "chrome/test/base/scoped_testing_local_state.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/policy/core/browser/browser_policy_connector.h"
 #include "components/policy/core/common/mock_configuration_policy_provider.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_types.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/web_ui.h"
@@ skipping 103 matching lines @@
              policy::POLICY_SOURCE_CLOUD,
              base::WrapUnique(new base::FundamentalValue(false)),
              nullptr);
   provider()->UpdateChromePolicy(*map());
   EXPECT_TRUE(test_web_ui()->call_data().empty());
 }
 
 }  // namespace settings
 
 #endif  // defined(GOOGLE_CHROME_BUILD) && !defined(OS_CHROMEOS)