Use backup pollser instead of connectivity watcher
diff --git a/config.w32 b/config.w32
index 0db7620..455d51c 100644
--- a/config.w32
+++ b/config.w32
@@ -255,12 +255,11 @@
     "src\\core\\tsi\\transport_security_adapter.cc " +
     "src\\core\\ext\\transport\\chttp2\\server\\chttp2_server.cc " +
     "src\\core\\ext\\transport\\chttp2\\client\\secure\\secure_channel_create.cc " +
+    "src\\core\\ext\\filters\\client_channel\\backup_poller.cc " +
     "src\\core\\ext\\filters\\client_channel\\channel_connectivity.cc " +
-    "src\\core\\ext\\filters\\client_channel\\channel_connectivity_internal.cc " +
     "src\\core\\ext\\filters\\client_channel\\client_channel.cc " +
     "src\\core\\ext\\filters\\client_channel\\client_channel_factory.cc " +
     "src\\core\\ext\\filters\\client_channel\\client_channel_plugin.cc " +
-    "src\\core\\ext\\filters\\client_channel\\connectivity_watcher.cc " +
     "src\\core\\ext\\filters\\client_channel\\connector.cc " +
     "src\\core\\ext\\filters\\client_channel\\http_connect_handshaker.cc " +
     "src\\core\\ext\\filters\\client_channel\\http_proxy.cc " +