Adding success/failure notification haptics for HUD display.

ios/chrome/browser/ui/uikit_ui_util.mm

Index: ios/chrome/browser/ui/uikit_ui_util.mm
diff --git a/ios/chrome/browser/ui/uikit_ui_util.mm b/ios/chrome/browser/ui/uikit_ui_util.mm
index 45d3ce5d0403735a1c11072793906ba0c6ef518d..6c9308aeb02af884b2fe02a90a9e75e4c45ff185 100644
--- a/ios/chrome/browser/ui/uikit_ui_util.mm
+++ b/ios/chrome/browser/ui/uikit_ui_util.mm
@@ -681,3 +681,13 @@ void TriggerHapticFeedbackForSelectionChange() {
     [generator selectionChanged];
   }
 }
+
+// On iOS10 and above, trigger a haptic vibration for a notification.
+// This is a no-op for devices that do not support it.
+void TriggerHapticFeedbackForNotification(UINotificationFeedbackType type) {
+  if (base::ios::IsRunningOnIOS10OrLater()) {
+    UINotificationFeedbackGenerator* generator =
+        [[UINotificationFeedbackGenerator alloc] init];
+    [generator notificationOccurred:type];
+  }
+}