Remove DialogDelegate::UseNewStyle and unused code.

chrome/browser/chromeos/login/captive_portal_window_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/login/captive_portal_window_proxy.h"
 #include "chrome/browser/chromeos/login/login_display_host_impl.h"
@@ skipping 57 matching lines @@
     ASSERT_EQ(num_portal_notifications, delegate_.num_portal_notifications());
   }
 
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     command_line->AppendSwitch(chromeos::switches::kForceLoginManagerInTests);
     command_line->AppendSwitch(chromeos::switches::kLoginManager);
   }
 
   virtual void SetUpOnMainThread() OVERRIDE {
     CHECK(LoginDisplayHostImpl::default_host());
-    gfx::NativeWindow native_window =
-        LoginDisplayHostImpl::default_host()->GetNativeWindow();
     content::WebContents* web_contents =
         LoginDisplayHostImpl::default_host()->GetWebUILoginView()->
             GetWebContents();
     captive_portal_window_proxy_.reset(
-        new CaptivePortalWindowProxy(&delegate_, native_window, web_contents));
+        new CaptivePortalWindowProxy(&delegate_, web_contents));
   }
 
  private:
   scoped_ptr<CaptivePortalWindowProxy> captive_portal_window_proxy_;
   CaptivePortalWindowProxyStubDelegate delegate_;
 };
 
 IN_PROC_BROWSER_TEST_F(CaptivePortalWindowTest, ShowClose) {
   CheckState(false, 0);
 
@@ skipping 55 matching lines @@
   CheckState(true, 2);
 
   Close();
   CheckState(false, 2);
 
   OnOriginalURLLoaded();
   CheckState(false, 2);
 }
 
 }  // namespace chromeos