Remove the external protocol dialog black border.

chrome/browser/ui/views/external_protocol_dialog.cc

Index: chrome/browser/ui/views/external_protocol_dialog.cc
diff --git a/chrome/browser/ui/views/external_protocol_dialog.cc b/chrome/browser/ui/views/external_protocol_dialog.cc
index 86944c5fb3c741c1b96dd5ad4d29b6a38f5e757f..4f19e29da30f896b5516e92d3e33bd6cecc56700 100644
--- a/chrome/browser/ui/views/external_protocol_dialog.cc
+++ b/chrome/browser/ui/views/external_protocol_dialog.cc
@@ -154,16 +154,14 @@ ExternalProtocolDialog::ExternalProtocolDialog(WebContents* web_contents,
   message_box_view_->SetCheckBoxLabel(
       l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_CHECKBOX_TEXT));
 
-  HWND root_hwnd;
+  // Dialog is top level if we don't have a web_contents associated with us.
+  HWND root_hwnd = NULL;
   if (web_contents_) {
     root_hwnd = GetAncestor(web_contents_->GetView()->GetContentNativeView(),
                             GA_ROOT);
-  } else {
-    // Dialog is top level if we don't have a web_contents associated with us.
-    root_hwnd = NULL;
   }
 
-  views::Widget::CreateWindowWithParent(this, root_hwnd)->Show();
+  views::DialogDelegate::CreateDialogWidget(this, NULL, root_hwnd)->Show();
 }
 
 // static