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

chrome/test/base/test_chrome_web_ui_controller_factory_browsertest.cc

Index: chrome/test/base/test_chrome_web_ui_controller_factory_browsertest.cc
diff --git a/chrome/test/base/test_chrome_web_ui_controller_factory_browsertest.cc b/chrome/test/base/test_chrome_web_ui_controller_factory_browsertest.cc
index 15ef7f9df07c58746906cd7c782693f82d028778..28ea7a5cff984338fd02d63b8d7eaf036af3b274 100644
--- a/chrome/test/base/test_chrome_web_ui_controller_factory_browsertest.cc
+++ b/chrome/test/base/test_chrome_web_ui_controller_factory_browsertest.cc
@@ -43,7 +43,7 @@ const char kChromeTestChromeWebUIControllerFactory[] =
 // going to this handler.
 class TestChromeWebUIControllerFactoryTest : public InProcessBrowserTest {
  public:
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     content::WebUIControllerFactory::UnregisterFactoryForTesting(
         ChromeWebUIControllerFactory::GetInstance());
     test_factory_.reset(new TestChromeWebUIControllerFactory);
@@ -52,7 +52,7 @@ class TestChromeWebUIControllerFactoryTest : public InProcessBrowserTest {
         GURL(kChromeTestChromeWebUIControllerFactory).host(), &mock_provider_);
   }
 
-  virtual void TearDownOnMainThread() override {
+  void TearDownOnMainThread() override {
     test_factory_->RemoveFactoryOverride(
         GURL(kChromeTestChromeWebUIControllerFactory).host());
     content::WebUIControllerFactory::UnregisterFactoryForTesting(