Need to create histograms for:
 + sync errors displayed
Related to: [GoogleServicesSettingsMediator updateSyncErrorSectionAndNotifyConsumer:]

 + each time sync error cell is tapped with kSyncServiceSignInNeedsUpdate error
Related to: [id<GoogleServicesSettingsLocalCommands> openReauthDialogAsSyncIsInAuthError]

 + authentication flow is started and the result when it ends
Related to: [id<GoogleServicesSettingsLocalCommands> restartAuthenticationFlow]