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Bug 861546 - Change Preferences.jsm so it does not need to guard against clearUserPref throwing. r=gavin, r=jaws

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Riadh Chtara 2013-05-20 16:54:21 -04:00
parent 09583f13d6
commit f1d5c0015d
1 changed files with 1 additions and 18 deletions
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19
toolkit/modules/Preferences.jsm
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@ -208,24 +208,7 @@ Preferences.prototype = {
return;
}
this._reset(prefName);
},
_reset: function(prefName) {
try {
this._prefSvc.clearUserPref(prefName);
}
catch(ex) {
// The pref service throws NS_ERROR_UNEXPECTED when the caller tries
// to reset a pref that doesn't exist or is already set to its default
// value. This interface fails silently in those cases, so callers
// can unconditionally reset a pref without having to check if it needs
// resetting first or trap exceptions after the fact. It passes through
// other exceptions, however, so callers know about them, since we don't
// know what other exceptions might be thrown and what they might mean.
if (ex.result != Cr.NS_ERROR_UNEXPECTED)
throw ex;
}
this._prefSvc.clearUserPref(prefName);
},
/**