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

ui/base/ime/chromeos/ime_keyboard_x11_unittest.cc

Index: ui/base/ime/chromeos/ime_keyboard_x11_unittest.cc
diff --git a/ui/base/ime/chromeos/ime_keyboard_x11_unittest.cc b/ui/base/ime/chromeos/ime_keyboard_x11_unittest.cc
index 358eab7a5d35820984b2e005a31ec2dce41a464b..d746b639ae66eb42ac486b012ebd9a9e1c961fc1 100644
--- a/ui/base/ime/chromeos/ime_keyboard_x11_unittest.cc
+++ b/ui/base/ime/chromeos/ime_keyboard_x11_unittest.cc
@@ -27,18 +27,18 @@ class ImeKeyboardTest : public testing::Test,
   ImeKeyboardTest() {
   }
 
-  virtual void SetUp() {
+  void SetUp() override {
     xkey_.reset(ImeKeyboard::Create());
     xkey_->AddObserver(this);
     caps_changed_ = false;
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     xkey_->RemoveObserver(this);
     xkey_.reset();
   }
 
-  virtual void OnCapsLockChanged(bool enabled) override {
+  void OnCapsLockChanged(bool enabled) override {
     caps_changed_ = true;
   }