arc: Add a global 5 minute timeout for ARC opt-in

chrome/browser/chromeos/arc/arc_optin_uma.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_ARC_ARC_OPTIN_UMA_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_OPTIN_UMA_H_
 
 namespace base {
 class TimeDelta;
 }
@@ skipping 57 matching lines @@
   GMS_SIGN_IN_TIMEOUT = 12,
   GMS_SIGN_IN_INTERNAL_ERROR = 13,
 
   // Cloud provision error:
   CLOUD_PROVISION_FLOW_TIMEOUT = 14,
   CLOUD_PROVISION_FLOW_INTERNAL_ERROR = 15,
 
   // ARC instance is stopped during the sign in procedure.
   ARC_STOPPED = 16,
 
+  // Overall sign in timeout.
+  OVERALL_SIGN_IN_TIMEOUT = 17,

[hidehiko, 2016/09/09 02:31:48]

Could you add an entry to tools/metrics/histograms/histograms.xml

[Luis Héctor Chávez, 2016/09/09 03:16:59]

Ah couldn't find this string in that file so I thought I didn't have to update
it :P Done.

+
   // The size of this enum; keep last.
   SIZE,
 };
 
 void UpdateOptInActionUMA(OptInActionType type);
 void UpdateOptInCancelUMA(OptInCancelReason reason);
 void UpdateEnabledStateUMA(bool enabled);
 void UpdateProvisioningResultUMA(ProvisioningResult result);
 void UpdateProvisioningTiming(const base::TimeDelta& elapsed_time,
                               bool success,
                               bool managed);
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_OPTIN_UMA_H_