Replace CHECK in NetworkChangeNotifierWin::WatchForAddressChange

with CHECK_EQ, so on failure, value will appear in minidumps.

BUG=69198
TEST=none

Review URL: http://codereview.chromium.org/7031054

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@86675 0039d316-1c4b-4281-b951-d872f2087c98

net/base/network_change_notifier_win.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -163,7 +163,7 @@ void NetworkChangeNotifierWin::OnObjectSignaled(HANDLE object) {
 void NetworkChangeNotifierWin::WatchForAddressChange() {
   HANDLE handle = NULL;
   DWORD ret = NotifyAddrChange(&handle, &addr_overlapped_);
-  CHECK(ret == ERROR_IO_PENDING);
+  CHECK_EQ(static_cast<DWORD>(ERROR_IO_PENDING), ret);
   addr_watcher_.StartWatching(addr_overlapped_.hEvent, this);
 }