Fix failure in NetUtilTest.IDNToUnicodeFast running on Chromecast.

net/base/net_util_icu.cc

Index: net/base/net_util_icu.cc
diff --git a/net/base/net_util_icu.cc b/net/base/net_util_icu.cc
index c667f18dbd13b1c45dacffaac08749a9b709849a..94e1a0d7232a65a7c517e714fa128fc571b47aa2 100644
--- a/net/base/net_util_icu.cc
+++ b/net/base/net_util_icu.cc
@@ -223,7 +223,7 @@ bool IsIDNComponentSafe(const base::char16* str,
   DCHECK(U_SUCCESS(status));
   icu::RegexMatcher dangerous_patterns(icu::UnicodeString(
       // Lone katakana no, so, or n
-      "[^\\p{Katakana}][\\u30ce\\u30f3\u30bd][^\\p{Katakana}]"
+      "[^\\p{Katakana}][\\u30ce\\u30f3\\u30bd][^\\p{Katakana}]"
       // Repeating Japanese accent characters
       "|[\\u3099\\u309a\\u309b\\u309c][\\u3099\\u309a\\u309b\\u309c]"),
       0, status);