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

chrome/installer/util/legacy_firewall_manager_win_unittest.cc

Index: chrome/installer/util/legacy_firewall_manager_win_unittest.cc
diff --git a/chrome/installer/util/legacy_firewall_manager_win_unittest.cc b/chrome/installer/util/legacy_firewall_manager_win_unittest.cc
index 5fd46388c97021c7cea17589208936cb1bb1ae91..61e5c24e5bfa903c1b5212dcaab15679458b1010 100644
--- a/chrome/installer/util/legacy_firewall_manager_win_unittest.cc
+++ b/chrome/installer/util/legacy_firewall_manager_win_unittest.cc
@@ -16,7 +16,7 @@ class LegacyFirewallManagerTest : public ::testing::Test {
 
  protected:
   // Sets up the test fixture.
-  virtual void SetUp() override {
+  void SetUp() override {
     if (base::GetCurrentProcessIntegrityLevel() != base::HIGH_INTEGRITY) {
       LOG(WARNING) << "Not elevated. Skipping the test.";
       return;
@@ -29,7 +29,7 @@ class LegacyFirewallManagerTest : public ::testing::Test {
   }
 
   // Tears down the test fixture.
-  virtual void TearDown() override {
+  void TearDown() override {
     if (!skip_test_)
       manager_.DeleteRule();
   }