Add URL filter to trigger punycode for Japanese homographic sequences....

net/base/net_util_unittest.cc

Index: net/base/net_util_unittest.cc
===================================================================
--- net/base/net_util_unittest.cc	(revision 52955)
+++ net/base/net_util_unittest.cc	(working copy)
@@ -128,6 +128,12 @@
     false, false, false, false, false,
     false, false, false, true, false,
     }},
+  {"xn--3ck7a7g.jp", L"\u30ce\u30f3\u30bd.jp",
+   {true, false, false, true,  false,
+    false, false, false, false, false,
+    false, false, false, false, false,
+    false, false, false, true, false,
+    }},
   // Katakana + Latin (Japanese)
   // TODO(jungshik): Change 'false' in the first element to 'true'
   // after upgrading to ICU 4.2.1 to use new uspoof_* APIs instead
@@ -138,6 +144,12 @@
     false, false, false, false, false,
     false, false, false, true, false,
     }},
+  {"xn--3bkxe.jp", L"\x30c8\x309a.jp",
+   {false, false, false, true,  false,
+    false, false, false, false, false,
+    false, false, false, false, false,
+    false, false, false, true, false,
+    }},
   // Hangul (Korean)
   {"www.xn--or3b17p6jjc.kr", L"www.\xc804\xc790\xc815\xbd80.kr",
    {true,  false, false, false, true,
@@ -322,7 +334,19 @@
      false, false, false, false, false,
      false, false, false, false, false,
      false, false, false, false, false,
-     }},
+  }},
+  {"google.xn--com-oh4ba.evil.jp", L"google.com\x309a\x309a.evil.jp",
+    {false, false, false, false, false,
+     false, false, false, false, false,
+     false, false, false, false, false,
+     false, false, false, false, false,
+  }},
+  {"google.xn--comevil-v04f.jp", L"google.com\x30ce" L"evil.jp",
+    {false, false, false, false, false,
+     false, false, false, false, false,
+     false, false, false, false, false,
+     false, false, false, false, false,
+  }},
 #if 0
   // These two cases are special. We need a separate test.
   // U+3000 and U+3002 are normalized to ASCII space and dot.