1 files changed, 119 insertions, 0 deletions
diff --git a/devtools/shared/deprecated-sync-thenables.js b/devtools/shared/deprecated-sync-thenables.js
new file mode 100644
index 000000000..52bf671cd
--- /dev/null
+++ b/devtools/shared/deprecated-sync-thenables.js
@@ -0,0 +1,119 @@
+/* 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/. */
+
+/**
+ * THIS MODULE IS DEPRECATED. IMPORT "Promise.jsm" INSTEAD.
+ */
+
+"use strict";
+
+this.Promise = {};
+
+if (typeof (require) === "function") {
+  module.exports = Promise;
+} else {
+  this.EXPORTED_SYMBOLS = ["Promise"];
+}
+
+function fulfilled(value) {
+  return { then: function then(fulfill) { fulfill(value); } };
+}
+
+function rejected(reason) {
+  return { then: function then(fulfill, reject) { reject(reason); } };
+}
+
+function isPromise(value) {
+  return value && typeof (value.then) === "function";
+}
+
+function defer() {
+  var observers = [];
+  var result = null;
+  var promise = {
+    then: function then(onFulfill, onError) {
+      var deferred = defer();
+
+      function resolve(value) {
+        try {
+          deferred.resolve(onFulfill ? onFulfill(value) : value);
+        } catch (error) {
+          deferred.resolve(rejected(error));
+        }
+      }
+
+      function reject(reason) {
+        try {
+          if (onError) deferred.resolve(onError(reason));
+          else deferred.resolve(rejected(reason));
+        } catch (error) {
+          deferred.resolve(rejected(error));
+        }
+      }
+
+      if (observers) {
+        observers.push({ resolve: resolve, reject: reject });
+      } else {
+        result.then(resolve, reject);
+      }
+
+      return deferred.promise;
+    }
+  };
+
+  var deferred = {
+    promise: promise,
+    resolve: function resolve(value) {
+      if (!result) {
+        result = isPromise(value) ? value : fulfilled(value);
+        while (observers.length) {
+          var observer = observers.shift();
+          result.then(observer.resolve, observer.reject);
+        }
+        observers = null;
+      }
+    },
+    reject: function reject(reason) {
+      deferred.resolve(rejected(reason));
+    }
+  };
+
+  return deferred;
+}
+Promise.defer = defer;
+
+function resolve(value) {
+  var deferred = defer();
+  deferred.resolve(value);
+  return deferred.promise;
+}
+Promise.resolve = resolve;
+
+function reject(reason) {
+  var deferred = defer();
+  deferred.reject(reason);
+  return deferred.promise;
+}
+Promise.reject = reject;
+
+var promised = (function () {
+  var call = Function.call;
+  var concat = Array.prototype.concat;
+  function execute(args) { return call.apply(call, args); }
+  function promisedConcat(promises, unknown) {
+    return promises.then(function (values) {
+      return resolve(unknown).then(function (value) {
+        return values.concat([ value ]);
+      });
+    });
+  }
+  return function promised(f) {
+    return function promised() {
+      return concat.apply([ f, this ], arguments).
+        reduce(promisedConcat, resolve([])).
+        then(execute);
+    };
+  };
+})();
+Promise.all = promised(Array);