Reduce views::Border creation verbosity by promoting factory functions

ui/message_center/views/notification_button.cc

Index: ui/message_center/views/notification_button.cc
diff --git a/ui/message_center/views/notification_button.cc b/ui/message_center/views/notification_button.cc
index beaa8d825c8f37f31b95f066dd80e994aede353c..ba0a793ca72624ea242f65b35fde32aadc5fe646 100644
--- a/ui/message_center/views/notification_button.cc
+++ b/ui/message_center/views/notification_button.cc
@@ -51,7 +51,7 @@ void NotificationButton::SetIcon(const gfx::ImageSkia& image) {
     icon_->SetImage(image);
     icon_->SetHorizontalAlignment(views::ImageView::LEADING);
     icon_->SetVerticalAlignment(views::ImageView::LEADING);
-    icon_->SetBorder(views::Border::CreateEmptyBorder(
+    icon_->SetBorder(views::CreateEmptyBorder(
         message_center::kButtonIconTopPadding, 0, 0, 0));
     AddChildViewAt(icon_, 0);
   }
@@ -68,7 +68,7 @@ void NotificationButton::SetTitle(const base::string16& title) {
     title_->SetEnabledColor(message_center::kRegularTextColor);
     title_->SetBackgroundColor(kRegularTextBackgroundColor);
     title_->SetBorder(
-        views::Border::CreateEmptyBorder(kButtonTitleTopPadding, 0, 0, 0));
+        views::CreateEmptyBorder(kButtonTitleTopPadding, 0, 0, 0));
     AddChildView(title_);
   }
   SetAccessibleName(title);