IDN: Map another CJK character skeleton

Bug: 1002687
Change-Id: I7a8801c81e6901d637e771c7a5873f8c49eaa979
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1797326
Auto-Submit: Christopher Thompson <cthomp@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Christopher Thompson <cthomp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695677}

components/url_formatter/spoof_checks/idn_spoof_checker.cc

@@ -193,7 +193,7 @@ IDNSpoofChecker::IDNSpoofChecker() {
   //     TODO: see https://crbug.com/843352 for further work on
   //     U+0525 and U+0153.
   //   - {U+0167 (ŧ), U+0442 (т), U+04AD (ҭ), U+050F (ԏ), U+4E03 (七),
-  //     U+4E05 (丅), U+4E06 (丆)} => t
+  //     U+4E05 (丅), U+4E06 (丆), U+4E01 (丁)} => t
   //   - {U+0185 (ƅ), U+044C (ь), U+048D (ҍ), U+0432 (в)} => b
   //   - {U+03C9 (ω), U+0448 (ш), U+0449 (щ), U+0E1E (พ),
   //      U+0E1F (ฟ), U+0E9E (ພ), U+0E9F (ຟ)} => w
@@ -230,7 +230,7 @@ IDNSpoofChecker::IDNSpoofChecker() {
       icu::UnicodeString::fromUTF8(
           "[æӕ] > ae; [þϼҏ] > p; [ħнћңҥӈӊԋԧԩ] > h;"
           "[ĸκкқҝҟҡӄԟ] > k; [ŋпԥกח] > n; œ > ce;"
-          "[ŧтҭԏ七丅丆] > t; [ƅьҍв] > b;  [ωшщพฟພຟ] > w;"
+          "[ŧтҭԏ七丅丆丁] > t; [ƅьҍв] > b;  [ωшщพฟພຟ] > w;"
           "[мӎ] > m; [єҽҿၔ] > e; ґ > r; [ғӻ] > f;"
           "[ҫင] > c; [ұ丫] > y; [χҳӽӿ乂] > x;"
           "[ԃძ]  > d; [ԍဌ] > g; [ടรຣຮ] > s; ၂ > j;"

components/url_formatter/spoof_checks/idn_spoof_checker_unittest.cc

@@ -1077,6 +1077,7 @@ const IDNTestCase kIdnCases[] = {
     {"xn--est-118d.net", L"七est.net", false},
     {"xn--est-918d.net", L"丅est.net", false},
     {"xn--est-e28d.net", L"丆est.net", false},
+    {"xn--est-t18d.net", L"丁est.net", false},
     {"xn--3-cq6a.com", L"丩3.com", false},
     {"xn--cxe-n68d.com", L"c丫xe.com", false},
     {"xn--cye-b98d.com", L"cy乂e.com", false},