Use FileWatcher to watch system resolver config, on systems that require...

chrome/browser/browser_main.cc

Index: chrome/browser/browser_main.cc
===================================================================
--- chrome/browser/browser_main.cc	(revision 70147)
+++ chrome/browser/browser_main.cc	(working copy)
@@ -90,6 +90,7 @@
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "net/base/cookie_monster.h"
+#include "net/base/dns_reload_timer.h"
 #include "net/base/net_module.h"
 #include "net/base/network_change_notifier.h"
 #include "net/http/http_network_layer.h"
@@ -1262,6 +1263,10 @@
   MaybeChangeUIFont();
 #endif
 
+#if WATCH_RESOLV_CONF
+  net::InitResolvConfWatcher(browser_process->file_thread());
+#endif
+
   // Record last shutdown time into a histogram.
   browser_shutdown::ReadLastShutdownInfo();