Standardize usage of virtual/override/final specifiers.

ui/views/controls/styled_label_unittest.cc

Index: ui/views/controls/styled_label_unittest.cc
diff --git a/ui/views/controls/styled_label_unittest.cc b/ui/views/controls/styled_label_unittest.cc
index 144e03feceae2ba7abe2492808d60664bb2ee849..8944a4708d6a9223d8857007cb33564dcae90a9c 100644
--- a/ui/views/controls/styled_label_unittest.cc
+++ b/ui/views/controls/styled_label_unittest.cc
@@ -24,11 +24,11 @@ namespace views {
 class StyledLabelTest : public ViewsTestBase, public StyledLabelListener {
  public:
   StyledLabelTest() {}
-  virtual ~StyledLabelTest() {}
+  ~StyledLabelTest() override {}
 
   // StyledLabelListener implementation.
-  virtual void StyledLabelLinkClicked(const gfx::Range& range,
-                                      int event_flags) override {}
+  void StyledLabelLinkClicked(const gfx::Range& range,
+                              int event_flags) override {}
 
  protected:
   StyledLabel* styled() { return styled_.get(); }