Place browser-modal dialogs like web-contents-modal dialogs.

chrome/browser/chromeos/external_protocol_dialog.cc

Index: chrome/browser/chromeos/external_protocol_dialog.cc
diff --git a/chrome/browser/chromeos/external_protocol_dialog.cc b/chrome/browser/chromeos/external_protocol_dialog.cc
index ca8fc87d3c8bcc78cdff602a019d22930bb8db00..fe7d285f48a15dc83690e1d6ff544460d0198288 100644
--- a/chrome/browser/chromeos/external_protocol_dialog.cc
+++ b/chrome/browser/chromeos/external_protocol_dialog.cc
@@ -9,6 +9,7 @@
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/external_protocol/external_protocol_handler.h"
 #include "chrome/browser/tab_contents/tab_util.h"
+#include "chrome/browser/ui/views/constrained_window_views.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #include "googleurl/src/gurl.h"
@@ -114,5 +115,5 @@ ExternalProtocolDialog::ExternalProtocolDialog(WebContents* web_contents,
     // Dialog is top level if we don't have a web_contents associated with us.
     parent_window = NULL;
   }
-  views::DialogDelegate::CreateDialogWidget(this, NULL, parent_window)->Show();
+  CreateBrowserModalDialogViews(this, parent_window)->Show();
 }