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+// 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_WEBUI_CONSTRAINED_HTML_UI_H_
+#define CHROME_BROWSER_WEBUI_CONSTRAINED_HTML_UI_H_
+#pragma once
+
+#include <vector>
+
+#include "chrome/browser/tab_contents/constrained_window.h"
+#include "chrome/browser/webui/web_ui.h"
+#include "chrome/common/property_bag.h"
+
+class HtmlDialogUIDelegate;
+class Profile;
+class RenderViewHost;
+class TabContents;
+
+class ConstrainedHtmlUIDelegate {
+ public:
+  virtual HtmlDialogUIDelegate* GetHtmlDialogUIDelegate() = 0;
+
+  // Called when the dialog should close.
+  virtual void OnDialogClose() = 0;
+};
+
+// ConstrainedHtmlUI is a facility to show HTML WebUI content
+// in a tab-modal constrained dialog.  It is implemented as an adapter
+// between an HtmlDialogUI object and a ConstrainedWindow object.
+//
+// Since ConstrainedWindow requires platform-specific delegate
+// implementations, this class is just a factory stub.
+class ConstrainedHtmlUI : public WebUI {
+ public:
+  explicit ConstrainedHtmlUI(TabContents* contents);
+  virtual ~ConstrainedHtmlUI();
+
+  virtual void RenderViewCreated(RenderViewHost* render_view_host);
+
+  // Create a constrained HTML dialog. The actual object that gets created
+  // is a ConstrainedHtmlUIDelegate, which later triggers construction of a
+  // ConstrainedHtmlUI object.
+  static void CreateConstrainedHtmlDialog(Profile* profile,
+                                          HtmlDialogUIDelegate* delegate,
+                                          TabContents* overshadowed);
+
+  // Returns a property accessor that can be used to set the
+  // ConstrainedHtmlUIDelegate property on a TabContents.
+  static PropertyAccessor<ConstrainedHtmlUIDelegate*>&
+      GetPropertyAccessor();
+
+ private:
+  // Returns the TabContents' PropertyBag's ConstrainedHtmlUIDelegate.
+  // Returns NULL if that property is not set.
+  ConstrainedHtmlUIDelegate* GetConstrainedDelegate();
+
+  // JS Message Handler
+  void OnDialogClose(const ListValue* args);
+
+  DISALLOW_COPY_AND_ASSIGN(ConstrainedHtmlUI);
+};
+
+#endif  // CHROME_BROWSER_WEBUI_CONSTRAINED_HTML_UI_H_