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

components/browser_watcher/exit_code_watcher_win_unittest.cc

 // Copyright (c) 2014 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 "components/browser_watcher/exit_code_watcher_win.h"
 
 #include "base/command_line.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
@@ skipping 61 matching lines @@
 };
 
 class ExitCodeWatcherTest : public testing::Test {
  public:
   typedef testing::Test Super;
 
   static const int kExitCode = 0xCAFEBABE;
 
   ExitCodeWatcherTest() : cmd_line_(base::CommandLine::NO_PROGRAM) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     Super::SetUp();
 
     override_manager_.OverrideRegistry(HKEY_CURRENT_USER);
   }
 
   base::Process OpenSelfWithAccess(uint32 access) {
     return base::Process::OpenWithAccess(base::GetCurrentProcId(), access);
   }
 
   void VerifyWroteExitCode(base::ProcessId proc_id, int exit_code) {
@@ skipping 68 matching lines @@
   // Kill the sleeper, and make sure it's exited before we continue.
   ASSERT_NO_FATAL_FAILURE(sleeper.Kill(kExitCode, true));
 
   watcher.WaitForExit();
   EXPECT_EQ(kExitCode, watcher.exit_code());
 
   VerifyWroteExitCode(sleeper.process().Pid(), kExitCode);
 }
 
 }  // namespace browser_watcher