From 1b84b11cf55fb17dbb9e845a586337dc3f6ec2a1 Mon Sep 17 00:00:00 2001
From: Igor Minar <igor@angular.io>
Date: Fri, 30 Nov 2018 10:42:35 -0800
Subject: [PATCH] Revert "fix(forms): apply unicode flag to pattern attribute
 when supported (#20819)" (#27375)

This reverts commit 3c34b8b4f1ad32aef1b2e5213b6236c54ad93416.

breaks google3 see http://cl/223526995

PR Close #27375
---
 packages/forms/src/directives/validators.ts | 5 -----
 packages/forms/src/validators.ts            | 6 +-----
 2 files changed, 1 insertion(+), 10 deletions(-)

diff --git a/packages/forms/src/directives/validators.ts b/packages/forms/src/directives/validators.ts
index d30bf483eb..210ac90432 100644
--- a/packages/forms/src/directives/validators.ts
+++ b/packages/forms/src/directives/validators.ts
@@ -379,11 +379,6 @@ export const PATTERN_VALIDATOR: any = {
  * as the regex to validate Control value against.  Follows pattern attribute
  * semantics; i.e. regex must match entire Control value.
  *
- * Note: if a string type attribute value is used, the regex will be applied with the
- * unicode flag on supported browsers. If a unicode-regex is passed, it might break on
- * unsupported browser. In this case, the user should be responsible to handle the
- * browser compatibility.
- *
  * @usageNotes
  * ### Example
  *
diff --git a/packages/forms/src/validators.ts b/packages/forms/src/validators.ts
index d88ba19db3..aa742aeea2 100644
--- a/packages/forms/src/validators.ts
+++ b/packages/forms/src/validators.ts
@@ -306,11 +306,7 @@ export class Validators {
 
       if (pattern.charAt(pattern.length - 1) !== '$') regexStr += '$';
 
-      if (RegExp.prototype.hasOwnProperty('unicode')) {
-        regex = new RegExp(regexStr, 'u');
-      } else {
-        regex = new RegExp(regexStr);
-      }
+      regex = new RegExp(regexStr);
     } else {
       regexStr = pattern.toString();
       regex = pattern;