TCPSockets are switched to the new Pepper proxy.

ppapi/proxy/error_conversion.cc

+// Copyright 2013 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 "ppapi/proxy/error_conversion.h"
+
+#include "ppapi/c/pp_errors.h"
+
+namespace ppapi {
+namespace proxy {
+
+int32_t ConvertNetworkAPIErrorForCompatibility(int32_t pp_error,
+                                               bool private_api) {
+  // The private API doesn't return network-specific error codes or
+  // PP_ERROR_NOACCESS. In order to preserve the behavior, we convert those to
+  // PP_ERROR_FAILED.
+  if (private_api &&
+      (pp_error <= PP_ERROR_CONNECTION_CLOSED ||
+       pp_error == PP_ERROR_NOACCESS)) {
+    return PP_ERROR_FAILED;
+  }
+  return pp_error;
+}
+
+}  // namespace proxy
+}  // namespace ppapi