Enable sandbox in local discovery utility process.

chrome/utility/local_discovery/service_discovery_message_handler.h

Index: chrome/utility/local_discovery/service_discovery_message_handler.h
diff --git a/chrome/utility/local_discovery/service_discovery_message_handler.h b/chrome/utility/local_discovery/service_discovery_message_handler.h
index 8b4bd1a7379190894c5436f9f23c1b0c8b1c76f1..910a35cae214600486dc280c562dcfd0eafd7edb 100644
--- a/chrome/utility/local_discovery/service_discovery_message_handler.h
+++ b/chrome/utility/local_discovery/service_discovery_message_handler.h
@@ -28,12 +28,14 @@ class ServiceDiscoveryMessageHandler : public chrome::UtilityMessageHandler {
   // UtilityMessageHandler implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  static void PreSandboxStartup();
+
  private:
   typedef std::map<uint64, linked_ptr<ServiceWatcher> > ServiceWatchers;
   typedef std::map<uint64, linked_ptr<ServiceResolver> > ServiceResolvers;
 
   // Lazy initializes ServiceDiscoveryClient.
-  void Initialize();
+  bool Initialize();
 
   // IPC message handlers.
   void OnStartWatcher(uint64 id, const std::string& service_type);