Add ы (U+042B) and ԍ (U+050D) to set of Cyrillic look-alikes.

This CL adds ы and ԍ to the set of Cyrillic characters that look like
Latin characters, as well as a test case to verify.

Bug: 884693
Change-Id: I0329b1c2bce2b733463346d69a2bae5d65234085
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1823320Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Commit-Queue: Mustafa Emre Acer <meacer@chromium.org>
Commit-Queue: Joe DeBlasio <jdeblasio@chromium.org>
Auto-Submit: Joe DeBlasio <jdeblasio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699536}

components/url_formatter/spoof_checks/idn_spoof_checker.cc

@@ -147,7 +147,7 @@ IDNSpoofChecker::IDNSpoofChecker() {
   // These Cyrillic letters look like Latin. A domain label entirely made of
   // these letters is blocked as a simplified whole-script-spoofable.
   cyrillic_letters_latin_alike_ = icu::UnicodeSet(
-      icu::UnicodeString::fromUTF8("[асԁеһіјӏорԗԛѕԝхуъЬҽпгѵѡ]"), status);
+      icu::UnicodeString::fromUTF8("[аысԁеԍһіјӏорԗԛѕԝхуъЬҽпгѵѡ]"), status);
   cyrillic_letters_latin_alike_.freeze();
 
   cyrillic_letters_ =

components/url_formatter/spoof_checks/idn_spoof_checker_unittest.cc

@@ -391,6 +391,9 @@ const IDNTestCase kIdnCases[] = {
     // ѕсоԗе.com is Cyrillic with Latin lookalikes.
     {"xn--e1ari3f61c.com", L"\x0455\x0441\x043e\x0517\x0435.com", false},
 
+    // ыоԍ.com is Cyrillic with Latin lookalikes
+    {"xn--n1az74c.com", L"\x044b\x043e\x050d.com", false},
+
     // Combining Diacritic marks after a script other than Latin-Greek-Cyrillic
     {"xn--rsa2568fvxya.com", L"\xd55c\x0301\xae00.com", false},  // 한́글.com
     {"xn--rsa0336bjom.com", L"\x6f22\x0307\x5b57.com", false},   // 漢̇字.com