Keep track of network error in ProxyRetryInfo.

net/proxy/proxy_info_unittest.cc

Index: net/proxy/proxy_info_unittest.cc
diff --git a/net/proxy/proxy_info_unittest.cc b/net/proxy/proxy_info_unittest.cc
index 377cff3438a5a8bd3513b4ee046c5d166456773b..cdceb835b4c0edb531ce23c86efc66834ae70db6 100644
--- a/net/proxy/proxy_info_unittest.cc
+++ b/net/proxy/proxy_info_unittest.cc
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "net/base/net_errors.h"
+#include "net/base/net_util.h"
 #include "net/proxy/proxy_info.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -32,7 +34,7 @@ TEST(ProxyInfoTest, ProxyInfoIsDirectOnly) {
   EXPECT_FALSE(info.is_direct());
   EXPECT_FALSE(info.is_direct_only());
   // After falling back to direct, we shouldn't consider it DIRECT only.
-  EXPECT_TRUE(info.Fallback(BoundNetLog()));
+  EXPECT_TRUE(info.Fallback(ERR_PROXY_CONNECTION_FAILED, BoundNetLog()));
   EXPECT_TRUE(info.is_direct());
   EXPECT_FALSE(info.is_direct_only());
 }