fix(protractor): Shows locator used when a timeout occurs

Author: luishvz

lib/element.js

@@ -130,7 +130,7 @@ ElementArrayFinder.prototype.all = function(locator) {
   var getWebElements = function() {
     if (self.getWebElements === null) {
       // This is the first time we are looking for an element
-      return ptor.waitForAngular().then(function() {
+      return ptor.waitForAngular('Locator: ' + locator).then(function() {
         if (locator.findElementsOverride) {
           return locator.findElementsOverride(ptor.driver, null, ptor.rootEl);
         } else {

lib/protractor.js

@@ -401,8 +401,11 @@ Protractor.prototype.waitForAngular = function(opt_description) {
       }
       if (timeout) {
         var errMsg = 'Timed out waiting for Protractor to synchronize with ' +
-            'the page after ' + timeout + '. Please see ' +
-            'https://github.com/angular/protractor/blob/master/docs/faq.md';
+        'the page after ' + timeout + '. Please see ' +
+        'https://github.com/angular/protractor/blob/master/docs/faq.md';
+        if(description.startsWith(' - Locator: ')){
+            errMsg += '\n' + description
+        };
         var pendingTimeoutsPromise;
         if (self.trackOutstandingTimeouts_) {
           pendingTimeoutsPromise = self.executeScript_(
@@ -426,14 +429,14 @@ Protractor.prototype.waitForAngular = function(opt_description) {
                 var key, pendingTasks = [];
                 for (key in pendingTimeouts) {
                   if (pendingTimeouts.hasOwnProperty(key)) {
-                    pendingTasks.push('- $timeout: ' + pendingTimeouts[key]);
+                    pendingTasks.push(' - $timeout: ' + pendingTimeouts[key]);
                   }
                 }
                 for (key in pendingHttps) {
-                  pendingTasks.push('- $http: ' + pendingHttps[key].url);
+                  pendingTasks.push(' - $http: ' + pendingHttps[key].url);
                 }
                 if (pendingTasks.length) {
-                  errMsg += '. The following tasks were pending:\n';
+                  errMsg += '. \nThe following tasks were pending:\n';
                   errMsg += pendingTasks.join('\n');
                 }
                 throw errMsg;