Add shadow/corner radius to notifications (toasts and in-center).

ui/views/border.cc

Index: ui/views/border.cc
diff --git a/ui/views/border.cc b/ui/views/border.cc
index 6baf545b809e2361d4c07ddfb17a6c523c8bd55e..d483a9c140d9291f18140f354547cb091631ed3f 100644
--- a/ui/views/border.cc
+++ b/ui/views/border.cc
@@ -245,13 +245,11 @@ std::unique_ptr<Border> CreateSolidSidedBorder(int top,
       gfx::Insets(top, left, bottom, right), color);
 }
 
-// static
 std::unique_ptr<Border> CreatePaddedBorder(std::unique_ptr<Border> border,
                                            const gfx::Insets& insets) {
   return base::MakeUnique<ExtraInsetsBorder>(std::move(border), insets);
 }
 
-// static
 std::unique_ptr<Border> CreateBorderPainter(std::unique_ptr<Painter> painter,
                                             const gfx::Insets& insets) {
   return base::WrapUnique(new BorderPainter(std::move(painter), insets));