Remove the idle action warning dialog extra border.

chrome/browser/chromeos/power/idle_action_warning_dialog_view.cc

Index: chrome/browser/chromeos/power/idle_action_warning_dialog_view.cc
diff --git a/chrome/browser/chromeos/power/idle_action_warning_dialog_view.cc b/chrome/browser/chromeos/power/idle_action_warning_dialog_view.cc
index 2c221741e20727d2f148f0779a494eab058d40b5..b1fa93e5dcb7a61bd8806f3b0f3494901f09027d 100644
--- a/chrome/browser/chromeos/power/idle_action_warning_dialog_view.cc
+++ b/chrome/browser/chromeos/power/idle_action_warning_dialog_view.cc
@@ -69,9 +69,8 @@ IdleActionWarningDialogView::IdleActionWarningDialogView() : closing_(false) {
   AddChildView(content);
   SetLayoutManager(new views::FillLayout());
 
-  views::Widget::CreateWindowWithContext(this,
-                                         ash::Shell::GetPrimaryRootWindow());
-  GetWidget()->Show();
+  views::DialogDelegate::CreateDialogWidget(
+      this, ash::Shell::GetPrimaryRootWindow(), NULL)->Show();
 }
 
 void IdleActionWarningDialogView::Close() {