Fix preconnect crash on synchronous socket error.

net/socket/client_socket_pool_base_unittest.cc

Index: net/socket/client_socket_pool_base_unittest.cc
diff --git a/net/socket/client_socket_pool_base_unittest.cc b/net/socket/client_socket_pool_base_unittest.cc
index 7c0e2e1ed1504809c017f15b999a44377e674183..200730950d0a63634b1185b2fdd8055ae7f6eb64 100644
--- a/net/socket/client_socket_pool_base_unittest.cc
+++ b/net/socket/client_socket_pool_base_unittest.cc
@@ -2925,6 +2925,13 @@ TEST_F(ClientSocketPoolBaseTest, RequestSocketsSynchronousError) {
                         BoundNetLog());
 
   ASSERT_FALSE(pool_->HasGroup("a"));
+
+  connect_job_factory_->set_job_type(
+      TestConnectJob::kMockAdditionalErrorStateJob);
+  pool_->RequestSockets("a", &params_, kDefaultMaxSocketsPerGroup,
+                        BoundNetLog());
+
+  ASSERT_FALSE(pool_->HasGroup("a"));
 }
 
 TEST_F(ClientSocketPoolBaseTest, RequestSocketsMultipleTimesDoesNothing) {