Standardize usage of virtual/override/final specifiers.

ui/views/layout/fill_layout.h

Index: ui/views/layout/fill_layout.h
diff --git a/ui/views/layout/fill_layout.h b/ui/views/layout/fill_layout.h
index 7496f7cf94464643d87483d96918f979a5618359..412fc53e227ab6ead2c4dd3c9801b9020e1d301d 100644
--- a/ui/views/layout/fill_layout.h
+++ b/ui/views/layout/fill_layout.h
@@ -21,13 +21,12 @@ namespace views {
 class VIEWS_EXPORT FillLayout : public LayoutManager {
  public:
   FillLayout();
-  virtual ~FillLayout();
+  ~FillLayout() override;
 
   // Overridden from LayoutManager:
-  virtual void Layout(View* host) override;
-  virtual gfx::Size GetPreferredSize(const View* host) const override;
-  virtual int GetPreferredHeightForWidth(const View* host,
-                                         int width) const override;
+  void Layout(View* host) override;
+  gfx::Size GetPreferredSize(const View* host) const override;
+  int GetPreferredHeightForWidth(const View* host, int width) const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FillLayout);