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

net/proxy/proxy_service_unittest.cc

Index: net/proxy/proxy_service_unittest.cc
diff --git a/net/proxy/proxy_service_unittest.cc b/net/proxy/proxy_service_unittest.cc
index e0472e7b3b0f237520a4634b5c734d6596d9949f..7813e339b9e7965986dc9c1c545c3b0c5c2a8e9c 100644
--- a/net/proxy/proxy_service_unittest.cc
+++ b/net/proxy/proxy_service_unittest.cc
@@ -29,6 +29,7 @@
 #include "net/proxy/proxy_config_service.h"
 #include "net/proxy/proxy_resolver.h"
 #include "net/proxy/proxy_script_fetcher.h"
+#include "net/proxy/proxy_server.h"
 #include "net/test/gtest_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -230,6 +231,9 @@ class TestResolveProxyDelegate : public ProxyDelegate {
       ProxyServer* alternative_proxy_server) const override {}
   void OnAlternativeProxyBroken(
       const ProxyServer& alternative_proxy_server) override {}
+  ProxyServer GetDefaultAlternativeProxy() const override {
+    return ProxyServer();
+  }
 
  private:
   bool on_resolve_proxy_called_;
@@ -273,6 +277,9 @@ class TestProxyFallbackProxyDelegate : public ProxyDelegate {
       ProxyServer* alternative_proxy_server) const override {}
   void OnAlternativeProxyBroken(
       const ProxyServer& alternative_proxy_server) override {}
+  ProxyServer GetDefaultAlternativeProxy() const override {
+    return ProxyServer();
+  }
 
   bool on_proxy_fallback_called() const {
     return on_proxy_fallback_called_;