Remove import lock dialog black border.

chrome/browser/ui/views/importer/import_lock_dialog_view.cc

Index: chrome/browser/ui/views/importer/import_lock_dialog_view.cc
diff --git a/chrome/browser/ui/views/importer/import_lock_dialog_view.cc b/chrome/browser/ui/views/importer/import_lock_dialog_view.cc
index 6c17958cd71e4187bf22dd1259ce435e4f92b2b9..a4b3168deb3fc7ebb0a577c57efe8af8b0c73d4c 100644
--- a/chrome/browser/ui/views/importer/import_lock_dialog_view.cc
+++ b/chrome/browser/ui/views/importer/import_lock_dialog_view.cc
@@ -36,7 +36,8 @@ void ShowImportLockDialog(gfx::NativeWindow parent,
 // static
 void ImportLockDialogView::Show(gfx::NativeWindow parent,
                                 const base::Callback<void(bool)>& callback) {
-  views::Widget::CreateWindow(new ImportLockDialogView(callback))->Show();
+  views::DialogDelegate::CreateDialogWidget(
+      new ImportLockDialogView(callback), NULL, NULL)->Show();
 }
 
 ImportLockDialogView::ImportLockDialogView(