Add an opt-out header for HTTP throttling. Never throttle for localhost.

net/base/net_util_unittest.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
 #include "net/base/net_util.h"
 
 #include "base/file_path.h"
 #include "base/format_macros.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
@@ skipping 2147 matching lines @@
     EXPECT_TRUE(net::ParseCIDRBlock(tests[i].cidr_literal,
                                     &ip_prefix,
                                     &prefix_length_in_bits));
 
     EXPECT_EQ(tests[i].expected_to_match,
               net::IPNumberMatchesPrefix(ip_number,
                                          ip_prefix,
                                          prefix_length_in_bits));
   }
 }
+
+TEST(NetUtilTest, IsLocalhost) {
+  EXPECT_TRUE(net::IsLocalhost("localhost"));
+  EXPECT_TRUE(net::IsLocalhost("127.0.0.1"));
+  EXPECT_TRUE(net::IsLocalhost("127.0.1.0"));
+  EXPECT_TRUE(net::IsLocalhost("127.1.0.0"));
+  EXPECT_TRUE(net::IsLocalhost("127.0.0.255"));
+  EXPECT_TRUE(net::IsLocalhost("127.0.255.0"));
+  EXPECT_TRUE(net::IsLocalhost("127.255.0.0"));
+  EXPECT_TRUE(net::IsLocalhost("::1"));
+  EXPECT_TRUE(net::IsLocalhost("0:0:0:0:0:0:0:1"));
+
+  EXPECT_FALSE(net::IsLocalhost("127.0.0.1.1"));
+  EXPECT_FALSE(net::IsLocalhost(".127.0.0.255"));
+  EXPECT_FALSE(net::IsLocalhost("::1:1"));
+  EXPECT_FALSE(net::IsLocalhost("0:0:0:0:1:0:0:1"));
+  EXPECT_FALSE(net::IsLocalhost("::1:1"));
+  EXPECT_FALSE(net::IsLocalhost("0:0:0:0:0:0:0:0:1"));
+}