Remove the message box dialog black border.

chrome/browser/ui/views/simple_message_box_views.cc

Index: chrome/browser/ui/views/simple_message_box_views.cc
diff --git a/chrome/browser/ui/views/simple_message_box_views.cc b/chrome/browser/ui/views/simple_message_box_views.cc
index 62b468ef030f3cf9afc24de64e648b9ba08c10e7..d7c8c2556a216a1b686c1b5dfd20419c39c41828 100644
--- a/chrome/browser/ui/views/simple_message_box_views.cc
+++ b/chrome/browser/ui/views/simple_message_box_views.cc
@@ -175,11 +175,7 @@ MessageBoxResult ShowMessageBox(gfx::NativeWindow parent,
                                 MessageBoxType type) {
   scoped_refptr<SimpleMessageBoxViews> dialog(
       new SimpleMessageBoxViews(title, message, type));
-
-  if (parent)
-    views::Widget::CreateWindowWithParent(dialog, parent)->Show();
-  else
-    views::Widget::CreateWindow(dialog)->Show();
+  views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent)->Show();
 
 #if defined(USE_AURA)
   // Use the widget's window itself so that the message loop