Clean up header files.

components/signin/core/browser/signin_metrics.h

 // 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.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_METRICS_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_METRICS_H_
 
 #include "base/time/time.h"
 
+#include <limits.h>
+
 #include "google_apis/gaia/google_service_auth_error.h"
 
 namespace signin_metrics {
 
 // Enum for the ways in which primary account detection is done.
 enum DifferentPrimaryAccounts {
   // token and cookie had same primary accounts.
   ACCOUNTS_SAME = 0,
   // Deprecated. Indicates different primary accounts.
   UNUSED_ACCOUNTS_DIFFERENT,
@@ skipping 250 matching lines @@
 void LogBrowsingSessionDuration(const base::Time& previous_activity_time);
 
 // Records the AccountReconcilor |state| when GAIA returns a specific response.
 // If |state| is different than ACCOUNT_RECONCILOR_OK it means the user will
 // be shown a different set of accounts in the content-area and the settings UI.
 void LogAccountReconcilorStateOnGaiaResponse(AccountReconcilorState state);
 
 }  // namespace signin_metrics
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_METRICS_H_