1 files changed, 0 insertions, 104 deletions
diff --git a/addon-sdk/source/lib/sdk/system/unload.js b/addon-sdk/source/lib/sdk/system/unload.js
deleted file mode 100644
index 98ab5f8f3..000000000
--- a/addon-sdk/source/lib/sdk/system/unload.js
+++ /dev/null
@@ -1,104 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-// Parts of this module were taken from narwhal:
-//
-// http://narwhaljs.org
-
-module.metadata = {
-  "stability": "experimental"
-};
-
-const { Cu } = require('chrome');
-const { on, off } = require('./events');
-const unloadSubject = require('@loader/unload');
-
-const observers = [];
-const unloaders = [];
-
-function WeakObserver(inner) {
-  this._inner = Cu.getWeakReference(inner);
-}
-
-Object.defineProperty(WeakObserver.prototype, 'value', {
-  get: function() { this._inner.get() }
-});
-
-var when = exports.when = function when(observer, opts) {
-  opts = opts || {};
-  for (var i = 0; i < observers.length; ++i) {
-    if (observers[i] === observer || observers[i].value === observer) {
-      return;
-    }
-  }
-  if (opts.weak) {
-    observers.unshift(new WeakObserver(observer));
-  } else {
-    observers.unshift(observer);
-  }
-};
-
-var ensure = exports.ensure = function ensure(obj, destructorName) {
-  if (!destructorName)
-    destructorName = "unload";
-  if (!(destructorName in obj))
-    throw new Error("object has no '" + destructorName + "' property");
-
-  let called = false;
-  let originalDestructor = obj[destructorName];
-
-  function unloadWrapper(reason) {
-    if (!called) {
-      called = true;
-      let index = unloaders.indexOf(unloadWrapper);
-      if (index == -1)
-        throw new Error("internal error: unloader not found");
-      unloaders.splice(index, 1);
-      originalDestructor.call(obj, reason);
-      originalDestructor = null;
-      destructorName = null;
-      obj = null;
-    }
-  };
-
-  // TODO: Find out why the order is inverted here. It seems that
-  // it may be causing issues!
-  unloaders.push(unloadWrapper);
-
-  obj[destructorName] = unloadWrapper;
-};
-
-function unload(reason) {
-  observers.forEach(function(observer) {
-    try {
-      if (observer instanceof WeakObserver) {
-        observer = observer.value;
-      }
-      if (typeof observer === 'function') {
-        observer(reason);
-      }
-    }
-    catch (error) {
-      console.exception(error);
-    }
-  });
-}
-
-when(function(reason) {
-  unloaders.slice().forEach(function(unloadWrapper) {
-    unloadWrapper(reason);
-  });
-});
-
-on('sdk:loader:destroy', function onunload({ subject, data: reason }) {
-  // If this loader is unload then `subject.wrappedJSObject` will be
-  // `destructor`.
-  if (subject.wrappedJSObject === unloadSubject) {
-    off('sdk:loader:destroy', onunload);
-    unload(reason);
-  }
-// Note that we use strong reference to listener here to make sure it's not
-// GC-ed, which may happen otherwise since nothing keeps reference to `onunolad`
-// function.
-}, true);