Reapply r72562 with willchan's nits + locally tested shlib fixes.

net/http/mock_allow_url_security_manager.cc

Index: net/http/mock_allow_url_security_manager.cc
diff --git a/net/http/mock_allow_url_security_manager.cc b/net/http/mock_allow_url_security_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e8b2c4ffe2bc9150d0e87b18e0c9c179b0ac514a
--- /dev/null
+++ b/net/http/mock_allow_url_security_manager.cc
@@ -0,0 +1,22 @@
+// 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/http/mock_allow_url_security_manager.h"
+
+namespace net {
+
+MockAllowURLSecurityManager::MockAllowURLSecurityManager() {}
+
+MockAllowURLSecurityManager::~MockAllowURLSecurityManager() {}
+
+bool MockAllowURLSecurityManager::CanUseDefaultCredentials(
+    const GURL& auth_origin) const {
+  return true;
+}
+
+bool MockAllowURLSecurityManager::CanDelegate(const GURL& auth_origin) const {
+  return true;
+}
+
+}  // namespace net