Explicitly whitelist the test server port.

net/base/net_util.h

Index: net/base/net_util.h
diff --git a/net/base/net_util.h b/net/base/net_util.h
index ad5795cdb3df8edcc9c3bd59dfd841f8ad81ddeb..bb145e0df0a3b6b7e85b402b2cfb3ea22e245755 100644
--- a/net/base/net_util.h
+++ b/net/base/net_util.h
@@ -71,7 +71,7 @@ extern const FormatUrlType kFormatUrlOmitTrailingSlashOnBareHostname;
 extern const FormatUrlType kFormatUrlOmitAll;
 
 // Holds a list of ports that should be accepted despite bans.
-extern std::set<int> explicitly_allowed_ports;
+extern std::multiset<int> explicitly_allowed_ports;
 
 // Given the full path to a file name, creates a file: URL. The returned URL
 // may not be valid if the input is malformed.
@@ -338,6 +338,17 @@ GURL SimplifyUrlForRequest(const GURL& url);
 
 void SetExplicitlyAllowedPorts(const std::string& allowed_ports);
 
+class ScopedPortException {
+ public:
+  ScopedPortException(int port);
+  ~ScopedPortException();
+
+ private:
+  int port_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedPortException);
+};
+
 // Perform a simplistic test to see if IPv6 is supported by trying to create an
 // IPv6 socket.
 // TODO(jar): Make test more in-depth as needed.