Remove DialogDelegate::UseNewStyle and unused code.

chrome/browser/ui/views/download/download_danger_prompt_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 "base/compiler_specific.h"
 #include "chrome/browser/download/download_danger_prompt.h"
 #include "chrome/browser/ui/views/constrained_window_views.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_contents_view.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/grid_layout.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/dialog_client_view.h"
 #include "ui/views/window/dialog_delegate.h"
@@ skipping 179 matching lines @@
 
   RunDone(DISMISS);
   return true;
 }
 
 // TODO(wittman): Remove this override once we move to the new style frame
 // view on all dialogs.
 views::NonClientFrameView* DownloadDangerPromptViews::CreateNonClientFrameView(
     views::Widget* widget) {
   return CreateConstrainedStyleNonClientFrameView(
-      widget,
-      web_contents_->GetBrowserContext());
+      widget, web_contents_->GetBrowserContext());
 }
 
 views::View* DownloadDangerPromptViews::GetInitiallyFocusedView() {
   return GetDialogClientView()->cancel_button();
 }
 
 views::View* DownloadDangerPromptViews::GetContentsView() {
   return contents_view_;
 }
 
@@ skipping 132 matching lines @@
     content::WebContents* web_contents,
     bool show_context,
     const OnDone& done) {
   DownloadDangerPromptViews* download_danger_prompt =
       new DownloadDangerPromptViews(item, web_contents, show_context, done);
 
   WebContentsModalDialogManager* web_contents_modal_dialog_manager =
       WebContentsModalDialogManager::FromWebContents(web_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.

   views::Widget* dialog = views::Widget::CreateWindowAsFramelessChild(
       download_danger_prompt,
-      web_contents->GetView()->GetNativeView(),
       modal_delegate->GetWebContentsModalDialogHost()->GetHostView());
   web_contents_modal_dialog_manager->ShowDialog(dialog->GetNativeView());
 
   return download_danger_prompt;
 }