Move GLIB_DISABLE_DEPRECATION_WARNINGS define to a more general place.

net/proxy/proxy_config_service_linux.cc

 // Copyright (c) 2012 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/proxy_config_service_linux.h"
 
-// glib >=2.40 deprecate g_settings_list_schemas in favor of
-// g_settings_schema_source_list_schemas. This function is not available on
-// earlier versions that we still need to support (specifically, 2.32), so
-// disable the warning.
-// TODO(mgiuca): Remove this suppression when we drop support for Ubuntu 13.10
-// (saucy) and earlier. Update the code to use
-// g_settings_schema_source_list_schemas instead.
-#define GLIB_DISABLE_DEPRECATION_WARNINGS
-
 #include <errno.h>
 #include <fcntl.h>
 #if defined(USE_GCONF)
 #include <gconf/gconf-client.h>
 #endif  // defined(USE_GCONF)
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/inotify.h>
 #include <unistd.h>
@@ skipping 1747 matching lines @@
 void ProxyConfigServiceLinux::RemoveObserver(Observer* observer) {
   delegate_->RemoveObserver(observer);
 }
 
 ProxyConfigService::ConfigAvailability
     ProxyConfigServiceLinux::GetLatestProxyConfig(ProxyConfig* config) {
   return delegate_->GetLatestProxyConfig(config);
 }
 
 }  // namespace net