Update {virtual,override} to follow C++11 style in chrome.

chrome/service/service_utility_process_host.cc

Index: chrome/service/service_utility_process_host.cc
diff --git a/chrome/service/service_utility_process_host.cc b/chrome/service/service_utility_process_host.cc
index 50da0b7386af8afe58d429ccb36e0b5b4914e439..765a43080528588c8489d474280289dc6871b0ca 100644
--- a/chrome/service/service_utility_process_host.cc
+++ b/chrome/service/service_utility_process_host.cc
@@ -60,8 +60,7 @@ class ServiceSandboxedProcessLauncherDelegate
  public:
   ServiceSandboxedProcessLauncherDelegate() {}
 
-  virtual void PreSpawnTarget(sandbox::TargetPolicy* policy,
-                              bool* success) override {
+  void PreSpawnTarget(sandbox::TargetPolicy* policy, bool* success) override {
     // Service process may run as windows service and it fails to create a
     // window station.
     policy->SetAlternateDesktop(false);