Don't call lower() on KURL protocol/host

third_party/WebKit/Source/platform/weborigin/SecurityOriginTest.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 454 matching lines @@
   RefPtr<SecurityOrigin> tupleOrigin =
       SecurityOrigin::createFromString("http://example.com");
 
   EXPECT_TRUE(uniqueOrigin->isSameSchemeHostPort(uniqueOrigin.get()));
   EXPECT_FALSE(
       SecurityOrigin::createUnique()->isSameSchemeHostPort(uniqueOrigin.get()));
   EXPECT_FALSE(tupleOrigin->isSameSchemeHostPort(uniqueOrigin.get()));
   EXPECT_FALSE(uniqueOrigin->isSameSchemeHostPort(tupleOrigin.get()));
 }
 
+TEST_F(SecurityOriginTest, CanonicalizeHost) {
+  struct TestCase {
+    const char* host;
+    const char* canonicalOutput;
+    bool expectedSuccess;
+  } cases[] = {
+      {"", "", true},
+      {"example.test", "example.test", true},
+      {"EXAMPLE.TEST", "example.test", true},
+      {"eXaMpLe.TeSt/path", "example.test%2Fpath", false},
+      {",", "%2C", true},
+      {"💩", "xn--ls8h", true},
+      {"[]", "[]", false},
+      {"%yo", "%25yo", false},
+  };
+
+  for (const TestCase& test : cases) {
+    SCOPED_TRACE(testing::Message() << "raw host: '" << test.host << "'");
+    String host = String::fromUTF8(test.host);
+    bool success = false;
+    String canonicalHost = SecurityOrigin::canonicalizeHost(host, &success);
+    EXPECT_EQ(test.canonicalOutput, canonicalHost);
+    EXPECT_EQ(test.expectedSuccess, success);
+  }
+}
+
 }  // namespace blink