fix(input): use apply on change event only when one isn't already in …

…progress

Closes angular#5293

src/ng/directive/input.js

@@ -407,7 +407,7 @@ function textInputType(scope, element, attr, ctrl, $sniffer, $browser) {
     });
   }
 
-  var listener = function(ev) {
+  var listener = function() {
     if (composing) return;
     var value = element.val();
 
@@ -419,11 +419,7 @@ function textInputType(scope, element, attr, ctrl, $sniffer, $browser) {
     }
 
     if (ctrl.$viewValue !== value) {
-      // If an event was performed natively, jQuery sets the isTrigger property.
-      // When triggering event manually, the field is not present. Manually
-      // triggered events are performed synchronously which causes the "$digest
-      // already in progress" error.
-      if (ev && ev.isTrigger) {
+      if (scope.$$phase) {
         ctrl.$setViewValue(value);
       } else {
         scope.$apply(function() {