Revert 85646 - Adds support for the DHCP portion of the WPAD (proxy auto-discovery) protocol.

net/proxy/dhcpcsvc_init_win.cc

Index: net/proxy/dhcpcsvc_init_win.cc
===================================================================
--- net/proxy/dhcpcsvc_init_win.cc	(revision 85647)
+++ net/proxy/dhcpcsvc_init_win.cc	(working copy)
@@ -1,40 +0,0 @@
-// Copyright (c) 2011 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 "net/proxy/dhcpcsvc_init_win.h"
-
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-
-#include <dhcpcsdk.h>
-#include <dhcpv6csdk.h>
-
-namespace {
-
-class DhcpcsvcInitSingleton {
- public:
-  DhcpcsvcInitSingleton() {
-    DWORD version = 0;
-    DWORD err = DhcpCApiInitialize(&version);
-    DCHECK(err == ERROR_SUCCESS);  // DCHECK_EQ complains of unsigned mismatch.
-  }
-
-  ~DhcpcsvcInitSingleton() {
-    // Worker pool threads that use the DHCP API may still be running, so skip
-    // cleanup.
-  }
-};
-
-static base::LazyInstance<DhcpcsvcInitSingleton> g_dhcpcsvc_init_singleton(
-    base::LINKER_INITIALIZED);
-
-}  // namespace
-
-namespace net {
-
-void EnsureDhcpcsvcInit() {
-  g_dhcpcsvc_init_singleton.Get();
-}
-
-}  // namespace net