<input type=number>: accept localized digits without showing them.

third_party/WebKit/Source/platform/text/PlatformLocaleTest.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "platform/text/PlatformLocale.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+TEST(PlatformLocaleTest, StripInvalidNumberCharacters) {
+  std::unique_ptr<Locale> locale = Locale::create("ar");
+  String result = locale->stripInvalidNumberCharacters(
+      String::fromUTF8("abc\xD9\xA0ghi"), "0123456789");
+  // ARABIC-INDIC DIGIT ZERO U+0660 = \xD9\xA0 in UTF-8
+  EXPECT_EQ(String::fromUTF8("\xD9\xA0"), result);
+}
+}