Reject some previuosly-escaped chars in hostnames.

net/http/http_security_headers_unittest.cc

Index: net/http/http_security_headers_unittest.cc
diff --git a/net/http/http_security_headers_unittest.cc b/net/http/http_security_headers_unittest.cc
index 2d816f1418d6f6a5fe3e8558436c13448216f39b..942c38ed9bd9b03189c4e98cd9632e6afe4c201c 100644
--- a/net/http/http_security_headers_unittest.cc
+++ b/net/http/http_security_headers_unittest.cc
@@ -624,17 +624,6 @@ static void TestValidPKPHeaders(HashValueTag tag) {
   EXPECT_EQ(expect_max_age, max_age);
   EXPECT_FALSE(include_subdomains);
 
-  // Test that the parser handles escaped values.
-  expect_report_uri = GURL("http://foo.com'a");
-  EXPECT_TRUE(ParseAsHPKPHeader("max-age=999; " + backup_pin + "; " + good_pin +
-                                    "; report-uri='http://foo.com\\'\\a'",
-                                chain_hashes, &max_age, &include_subdomains,
-                                &hashes, &report_uri));
-  expect_max_age = base::TimeDelta::FromSeconds(999);
-  EXPECT_EQ(expect_max_age, max_age);
-  EXPECT_FALSE(include_subdomains);
-  EXPECT_EQ(expect_report_uri, report_uri);
-
   // Test that the parser does not require max-age for Report-Only
   // headers.
   expect_report_uri = GURL("http://foo.com");