Update from https://crrev.com/308331

net/data/proxy_resolver_v8_unittest/pac_library_unittest.js

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 // This should output "PROXY success:80" if all the tests pass.
 // Otherwise it will output "PROXY failure:<num-failures>".
 //
 // This aims to unit-test the PAC library functions, which are
 // exposed in the PAC's execution environment. (Namely, dnsDomainLevels,
 // timeRange, etc.)
 
 function FindProxyForURL(url, host) {
   var numTestsFailed = 0;
 
@@ skipping 43 matching lines @@
   t.expectTrue(isInNet("192.89.132.25", "192.89.0.0", "255.255.0.0"));
   t.expectFalse(isInNet("193.89.132.25", "192.89.0.0", "255.255.0.0"));
 
   t.expectFalse(
       isInNet("192.89.132.a", "192.89.0.0", "255.255.0.0"));
 };
 
 Tests.testIsPlainHostName = function(t) {
   t.expectTrue(isPlainHostName("google"));
   t.expectFalse(isPlainHostName("google.com"));
+  t.expectFalse(isPlainHostName("192.168.1.1"));
+  t.expectFalse(isPlainHostName("."));
+  t.expectFalse(isPlainHostName(".:"));
+
+  // Valid IPv6 address
+  t.expectFalse(isPlainHostName("::1"));
+
+  // Not a valid IPv6 address
+  t.expectTrue(isPlainHostName("foopy::1"));
+  t.expectTrue(isPlainHostName("foo:112"));
+  t.expectTrue(isPlainHostName(":"));
+  t.expectTrue(isPlainHostName("[:]"));
+
+  // Not considered a valid IPv6 address because of surrounding brackets.
+  t.expectTrue(isPlainHostName("[::1]"));
+
+  // Calling with more than 1 argument is allowed.
+  t.expectTrue(isPlainHostName("foo", "foo", "foo"));
+
+  // Calling with no arguments is an error.
+  try {
+    isPlainHostName();
+    t.expectTrue(false);  // Not reached.
+  } catch (e) {
+    t.expectEquals('TypeError: Requires 1 string parameter', e.toString());
+  }
+
+  // Calling with the wrong argument type is an error.
+  try {
+    isPlainHostName(null);
+    t.expectTrue(false);  // Not reached.
+  } catch (e) {
+    t.expectEquals('TypeError: Requires 1 string parameter', e.toString());
+  }
+
+  // Calling with the wrong argument type is an error.
+  try {
+    isPlainHostName(1);
+    t.expectTrue(false);  // Not reached.
+  } catch (e) {
+    t.expectEquals('TypeError: Requires 1 string parameter', e.toString());
+  }
+
+  // Calling with the wrong argument type is an error.
+  try {
+    isPlainHostName(function() {});
+    t.expectTrue(false);  // Not reached.
+  } catch (e) {
+    t.expectEquals('TypeError: Requires 1 string parameter', e.toString());
+  }
 };
 
 Tests.testLocalHostOrDomainIs = function(t) {
   t.expectTrue(localHostOrDomainIs("www.google.com", "www.google.com"));
   t.expectTrue(localHostOrDomainIs("www", "www.google.com"));
   t.expectFalse(localHostOrDomainIs("maps.google.com", "www.google.com"));
 };
 
 Tests.testShExpMatch = function(t) {
   t.expectTrue(shExpMatch("foo.jpg", "*.jpg"));
@@ skipping 283 matching lines @@
   "toGMTString", "toUTCString", "getYear", "setYear"
 ];
 
 MockDate.setCurrent = function(currentDateString) {
   MockDate.currentDateString_ = currentDateString;
 }
 
 // Bind the methods to proxy requests to the wrapped Date().
 MockDate.init();