Standardize usage of virtual/override/final specifiers.

ui/views/controls/scroll_view_unittest.cc

Index: ui/views/controls/scroll_view_unittest.cc
diff --git a/ui/views/controls/scroll_view_unittest.cc b/ui/views/controls/scroll_view_unittest.cc
index 9baa4d37c4765bcd18f43921e976d66221bd175d..cac64be0991c7b9b24fcda1675da81b635bcd7ab 100644
--- a/ui/views/controls/scroll_view_unittest.cc
+++ b/ui/views/controls/scroll_view_unittest.cc
@@ -26,11 +26,9 @@ class CustomView : public View {
     PreferredSizeChanged();
   }
 
-  virtual gfx::Size GetPreferredSize() const override {
-    return preferred_size_;
-  }
+  gfx::Size GetPreferredSize() const override { return preferred_size_; }
 
-  virtual void Layout() override {
+  void Layout() override {
     gfx::Size pref = GetPreferredSize();
     int width = pref.width();
     int height = pref.height();