feat($timeout): pass arguments in callback

setTimeout allows you to pass arguments into the callback function in
the …3rd argument. Since that’s taken I added it to the …4th
mdn.io/setTimeout#Syntax

Author: PatrickJS

src/ng/timeout.js

@@ -28,19 +28,21 @@ function $TimeoutProvider() {
       * @param {number=} [delay=0] Delay in milliseconds.
       * @param {boolean=} [invokeApply=true] If set to `false` skips model dirty checking, otherwise
       *   will invoke `fn` within the {@link ng.$rootScope.Scope#$apply $apply} block.
+      * @param {...*=} Pass additional parameters to the executed function.
       * @returns {Promise} Promise that will be resolved when the timeout is reached. The value this
       *   promise will be resolved with is the return value of the `fn` function.
       *
       */
     function timeout(fn, delay, invokeApply) {
-      var skipApply = (isDefined(invokeApply) && !invokeApply),
+      var args = arguments.length > 3 ? sliceArgs(arguments, 3) : [],
+          skipApply = (isDefined(invokeApply) && !invokeApply),
           deferred = (skipApply ? $$q : $q).defer(),
           promise = deferred.promise,
           timeoutId;
 
       timeoutId = $browser.defer(function() {
         try {
-          deferred.resolve(fn());
+          deferred.resolve(fn.apply(null, args));
         } catch (e) {
           deferred.reject(e);
           $exceptionHandler(e);

test/ng/timeoutSpec.js

@@ -145,6 +145,19 @@ describe('$timeout', function() {
     }));
 
 
+    it('should pass the timeout arguments in the timeout callback',
+        inject(function($timeout, log) {
+      var promise1 = $timeout(function(arg) { throw arg; }, 0, true, 'Some Argument');
+      var promise2 = $timeout(function(arg1, args2) { throw arg1 +' '+ args2; }, 0, true, 'Are Meant', 'To Be Thrown');
+
+      promise1.then(log.fn('success'), function(reason) { log('error: ' + reason); });
+      promise2.then(log.fn('success'), function(reason) { log('error: ' + reason); });
+      $timeout.flush();
+
+      expect(log).toEqual('error: Some Argument; error: Are Meant To Be Thrown');
+    }));
+
+
     it('should forget references to relevant deferred even when exception is thrown',
         inject(function($timeout, $browser) {
       // $browser.defer.cancel is only called on cancel if the deferred object is still referenced