Standardize usage of virtual/override/final specifiers.

ui/views/controls/separator.h

Index: ui/views/controls/separator.h
diff --git a/ui/views/controls/separator.h b/ui/views/controls/separator.h
index 7c964b7444ba15d225763a6d0e3a773ca99576f7..39004baf378e41b7c839d7199cb4da9fb8d37430 100644
--- a/ui/views/controls/separator.h
+++ b/ui/views/controls/separator.h
@@ -25,14 +25,13 @@ class VIEWS_EXPORT Separator : public View {
   static const char kViewClassName[];
 
   explicit Separator(Orientation orientation);
-  virtual ~Separator();
+  ~Separator() override;
 
   // Overridden from View:
-  virtual gfx::Size GetPreferredSize() const override;
-  virtual void GetAccessibleState(ui::AXViewState* state) override;
-  virtual void Paint(gfx::Canvas* canvas,
-                     const views::CullSet& cull_set) override;
-  virtual const char* GetClassName() const override;
+  gfx::Size GetPreferredSize() const override;
+  void GetAccessibleState(ui::AXViewState* state) override;
+  void Paint(gfx::Canvas* canvas, const views::CullSet& cull_set) override;
+  const char* GetClassName() const override;
 
  private:
   const Orientation orientation_;