Reimplements net::AddressList without struct addrinfo.

net/base/single_request_host_resolver_unittest.cc

Index: net/base/single_request_host_resolver_unittest.cc
diff --git a/net/base/single_request_host_resolver_unittest.cc b/net/base/single_request_host_resolver_unittest.cc
index 295a3186ae0611604d51d22fd2b84963c75ac17f..b23a722e0496c5e9b3e8bcac7ac9ea65dac0947e 100644
--- a/net/base/single_request_host_resolver_unittest.cc
+++ b/net/base/single_request_host_resolver_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -82,7 +82,8 @@ TEST(SingleRequestHostResolverTest, NormalResolve) {
   EXPECT_EQ(OK, callback.WaitForResult());
 
   // Verify that the result is what we specified in the MockHostResolver.
-  EXPECT_EQ("199.188.1.166", NetAddressToString(addrlist.head()));
+  ASSERT_FALSE(addrlist.empty());
+  EXPECT_EQ("199.188.1.166", addrlist.front().ToStringWithoutPort());
 }
 
 // Test that the Cancel() method cancels any outstanding request.