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diff --git a/tools/addon-sdk-1.4/packages/api-utils/lib/errors.js b/tools/addon-sdk-1.4/packages/api-utils/lib/errors.js
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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Jetpack.
+ *
+ * The Initial Developer of the Original Code is Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2007
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Atul Varma <atul@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+"use strict";
+
+function logToConsole(e) {
+  console.exception(e);
+}
+
+var catchAndLog = exports.catchAndLog = function(callback,
+                                                 defaultResponse,
+                                                 logException) {
+  if (!logException)
+    logException = logToConsole;
+
+  return function() {
+    try {
+      return callback.apply(this, arguments);
+    } catch (e) {
+      logException(e);
+      return defaultResponse;
+    }
+  };
+};
+
+exports.catchAndLogProps = function catchAndLogProps(object,
+                                                     props,
+                                                     defaultResponse,
+                                                     logException) {
+  if (typeof(props) == "string")
+    props = [props];
+  props.forEach(
+    function(property) {
+      object[property] = catchAndLog(object[property],
+                                     defaultResponse,
+                                     logException);
+    });
+};
+
+/**
+ * Catch and return an exception while calling the callback.  If the callback
+ * doesn't throw, return the return value of the callback in a way that makes it
+ * possible to distinguish between a return value and an exception.
+ *
+ * This function is useful when you need to pass the result of a call across
+ * a process boundary (across which exceptions don't propagate).  It probably
+ * doesn't need to be factored out into this module, since it is only used by
+ * a single caller, but putting it here works around bug 625560.
+ */
+exports.catchAndReturn = function(callback) {
+  return function() {
+    try {
+      return { returnValue: callback.apply(this, arguments) };
+    }
+    catch (exception) {
+      return { exception: exception };
+    }
+  };
+};