Remove calls to deprecated MessageLoop methods in chrome.

chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc

Index: chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
diff --git a/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc b/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
index 5d51f58736c7165a5649311f56414fd4aee76bb0..28b907670848aa2dd89218ba3399360b7ebc9b9d 100644
--- a/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
+++ b/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
@@ -10,6 +10,7 @@
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "chrome/browser/local_discovery/service_discovery_client_impl.h"
 #include "net/dns/mdns_client.h"
 
@@ -119,6 +120,6 @@ int main(int argc, char** argv) {
         std::string(argv[1]) + "._tcp.local");
 
     print_changes.Start();
-    message_loop.Run();
+    base::RunLoop().Run();
   }
 }