Add UMA for policy load result of enrolled Chrome OS devices.

chrome/browser/chromeos/settings/device_settings_service.cc

Index: chrome/browser/chromeos/settings/device_settings_service.cc
diff --git a/chrome/browser/chromeos/settings/device_settings_service.cc b/chrome/browser/chromeos/settings/device_settings_service.cc
index 0c54895c9f00739be934aeace13337c440b5c951..6cd9a2f79f3f7d4ec4e9fba8896c30725357aef4 100644
--- a/chrome/browser/chromeos/settings/device_settings_service.cc
+++ b/chrome/browser/chromeos/settings/device_settings_service.cc
@@ -362,6 +362,10 @@ void DeviceSettingsService::HandleCompletedOperation(
             FROM_HERE,
             base::Bind(&DeviceSettingsService::Load, base::Unretained(this)),
             base::TimeDelta::FromMilliseconds(kLoadRetryDelayMs));
+      } else {
+        // Once we've given up retrying, the validation error is not temporary
+        // anymore.
+        store_status_ = STORE_VALIDATION_ERROR;
       }
     }
   }