fix(testForAngular): add a message when page load does not complete i…

…n time

lib/protractor.js

@@ -659,7 +659,7 @@ Protractor.prototype.get = function(destination, opt_timeout) {
     return self.driver.getCurrentUrl().then(function(url) {
       return url !== 'about:blank';
     });
-  }, timeout * 1000);
+  }, timeout * 1000, 'Timed out waiting for page to load');
 
   var assertAngularOnPage = function(arr) {
     var hasAngular = arr[0];