Reland add --use-more-webui runtime flag to toggle WebUI replacements for native dialogs.

chrome/browser/ui/webui/hung_renderer_dialog.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_HUNG_RENDERER_DIALOG_H_
 #define CHROME_BROWSER_UI_WEBUI_HUNG_RENDERER_DIALOG_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/string16.h"
 #include "base/values.h"
 #include "chrome/browser/ui/webui/html_dialog_ui.h"
 #include "ui/gfx/native_widget_types.h"
 
 class TabContents;
+class HungRendererDialogHandler;
 
 class HungRendererDialog : private HtmlDialogUIDelegate {
  public:
   // Shows a hung renderer dialog.
   static void ShowHungRendererDialog(TabContents* contents);
 
   // Hides a hung renderer dialog.
   static void HideHungRendererDialog(TabContents* contents);
 
  private:
@@ skipping 14 matching lines @@
   virtual void GetDialogSize(gfx::Size* size) const OVERRIDE;
   virtual std::string GetDialogArgs() const OVERRIDE;
   virtual void OnDialogClosed(const std::string& json_retval) OVERRIDE;
   virtual void OnCloseContents(TabContents* source,
                                bool* out_close_dialog) OVERRIDE;
   virtual bool ShouldShowDialogTitle() const OVERRIDE;
 
   // The tab contents.
   TabContents* contents_;
 
+  // The dialog handler.
+  HungRendererDialogHandler* handler_;
+
   // The dialog window.
   gfx::NativeWindow window_;
 
   DISALLOW_COPY_AND_ASSIGN(HungRendererDialog);
 };
 
 // Dialog handler that handles calls from the JS WebUI code to get the details
 // of the list of frozen tabs.
 class HungRendererDialogHandler : public WebUIMessageHandler {
  public:
   explicit HungRendererDialogHandler(TabContents* contents);
 
+  void CloseDialog();
+
   // Overridden from WebUIMessageHandler
   virtual void RegisterMessages();
 
  private:
   void RequestTabContentsList(const base::ListValue* args);
 
   // The tab contents.
   TabContents* contents_;
 
   DISALLOW_COPY_AND_ASSIGN(HungRendererDialogHandler);
 };
 
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HUNG_RENDERER_DIALOG_H_