Add a QUIC proxy server to the list of QUIC servers supported at start up

net/base/test_proxy_delegate.cc

 // Copyright 2016 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/test_proxy_delegate.h"
 
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 79 matching lines @@
   get_alternative_proxy_invocations_++;
 }
 
 void TestProxyDelegate::OnAlternativeProxyBroken(
     const ProxyServer& alternative_proxy_server) {
   EXPECT_TRUE(alternative_proxy_server.is_valid());
   EXPECT_EQ(alternative_proxy_server_, alternative_proxy_server);
   alternative_proxy_server_ = ProxyServer();
 }
 
+ProxyServer TestProxyDelegate::GetDefaultAlternativeProxy() const {
+  return alternative_proxy_server_;
+}
+
 }  // namespace net