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

chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.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 "chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_navigator.h"
@@ skipping 80 matching lines @@
   ui::CheckShouldPromptForNewProfile(
       profile,
       // This callback is guaranteed to be invoked, and once it is, the dialog
       // owns itself.
       base::Bind(&ProfileSigninConfirmationDialogViews::Show,
                  base::Unretained(dialog)));
 }
 
 void ProfileSigninConfirmationDialogViews::Show(bool prompt_for_new_profile) {
   prompt_for_new_profile_ = prompt_for_new_profile;
-  CreateDialogWidget(this, NULL, browser_->window()->GetNativeWindow())->Show();
+  CreateBrowserModalDialogViews(
+      this, browser_->window()->GetNativeWindow())->Show();
 }
 
 string16 ProfileSigninConfirmationDialogViews::GetWindowTitle() const {
   return l10n_util::GetStringUTF16(
       IDS_ENTERPRISE_SIGNIN_TITLE_NEW_STYLE);
 }
 
 string16 ProfileSigninConfirmationDialogViews::GetDialogButtonLabel(
     ui::DialogButton button) const {
   return l10n_util::GetStringUTF16((button == ui::DIALOG_BUTTON_OK) ?
@@ skipping 112 matching lines @@
     const ui::Range& range,
     int event_flags) {
   chrome::NavigateParams params(
       browser_,
       GURL("http://support.google.com/chromeos/bin/answer.py?answer=1331549"),
       content::PAGE_TRANSITION_LINK);
   params.disposition = NEW_POPUP;
   params.window_action = chrome::NavigateParams::SHOW_WINDOW;
   chrome::Navigate(&params);
 }