Remove DialogDelegate::UseNewStyle and unused code.

chrome/browser/ui/views/login_prompt_views.cc

Index: chrome/browser/ui/views/login_prompt_views.cc
diff --git a/chrome/browser/ui/views/login_prompt_views.cc b/chrome/browser/ui/views/login_prompt_views.cc
index 7daad818b7695d700566b40e01fba530ab99724f..6ef80eff783b9b3474f9534480a8d16e5cb0148f 100644
--- a/chrome/browser/ui/views/login_prompt_views.cc
+++ b/chrome/browser/ui/views/login_prompt_views.cc
@@ -17,7 +17,6 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_contents_view.h"
 #include "grit/generated_resources.h"
 #include "net/url_request/url_request.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -157,11 +156,8 @@ class LoginHandlerViews : public LoginHandler,
         WebContentsModalDialogManager::FromWebContents(requesting_contents);
     WebContentsModalDialogManagerDelegate* modal_delegate =
         web_contents_modal_dialog_manager->delegate();
-    CHECK(modal_delegate);

[sky, 2013/11/16 03:03:16]

and here

[msw, 2013/11/16 04:15:44]

Done.

     dialog_ = views::Widget::CreateWindowAsFramelessChild(
-        this,
-        requesting_contents->GetView()->GetNativeView(),
-        modal_delegate->GetWebContentsModalDialogHost()->GetHostView());
+        this, modal_delegate->GetWebContentsModalDialogHost()->GetHostView());
     web_contents_modal_dialog_manager->ShowDialog(dialog_->GetNativeView());
     NotifyAuthNeeded();
   }