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

chrome/browser/service_process/service_process_control_browsertest.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 "chrome/browser/service_process/service_process_control.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
@@ skipping 47 matching lines @@
   static void CloudPrintInfoCallback(
       const cloud_print::CloudPrintProxyInfo& proxy_info) {
     QuitMessageLoop();
   }
 
   void Disconnect() {
     // This will close the IPC connection.
     ServiceProcessControl::GetInstance()->Disconnect();
   }
 
-  virtual void SetUp() override {
+  void SetUp() override {
     // This should not be needed because TearDown() ends with a closed
     // service_process_, but HistogramsTimeout and Histograms fail without this
     // on Mac.
     service_process_.Close();
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     if (ServiceProcessControl::GetInstance()->IsConnected())
       EXPECT_TRUE(ServiceProcessControl::GetInstance()->Shutdown());
 #if defined(OS_MACOSX)
     // ForceServiceProcessShutdown removes the process from launched on Mac.
     ForceServiceProcessShutdown("", 0);
 #endif  // OS_MACOSX
     if (service_process_.IsValid()) {
       int exit_code;
       EXPECT_TRUE(service_process_.WaitForExitWithTimeout(
           TestTimeouts::action_max_timeout(), &exit_code));
@@ skipping 196 matching lines @@
   // Callback should not be called during GetHistograms call.
   EXPECT_CALL(*this, MockHistogramsCallback()).Times(0);
   // Wait for real callback by providing large timeout value.
   EXPECT_TRUE(ServiceProcessControl::GetInstance()->GetHistograms(
       base::Bind(&ServiceProcessControlBrowserTest::HistogramsCallback,
                 base::Unretained(this)),
       base::TimeDelta::FromHours(1)));
   EXPECT_CALL(*this, MockHistogramsCallback()).Times(1);
   content::RunMessageLoop();
 }