Revert of [Chromecast] Ignore interfaces not used to connect to internet.

chromecast/net/net_util_cast.cc

-// Copyright 2015 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 "chromecast/net/net_util_cast.h"
-
-#include "base/command_line.h"
-#include "base/strings/string_split.h"
-#include "chromecast/base/cast_sys_info_util.h"
-#include "chromecast/net/net_switches.h"
-#include "chromecast/public/cast_sys_info.h"
-
-namespace chromecast {
-
-base::hash_set<std::string> GetIgnoredInterfaces() {
-  base::hash_set<std::string> ignored_interfaces;
-  scoped_ptr<CastSysInfo> sys_info = CreateSysInfo();
-  if (!sys_info->GetApInterface().empty())
-    ignored_interfaces.insert(sys_info->GetApInterface());
-
-  // Add interfaces from "netif-to-ignore" switch.
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  base::CommandLine::StringType netifs_to_ignore_str =
-      command_line->GetSwitchValueNative(switches::kNetifsToIgnore);
-  base::CommandLine::StringVector netifs_to_ignore_vector;
-  base::SplitString(netifs_to_ignore_str, ',', &netifs_to_ignore_vector);
-  for (const auto& netif : netifs_to_ignore_vector)
-    ignored_interfaces.insert(netif);
-
-  return ignored_interfaces;
-}
-
-}  // namespace chromecast