Remove JS dialog dependency from content.

chrome/browser/ui/app_modal_dialogs/message_box_handler.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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_APP_MODAL_DIALOGS_MESSAGE_BOX_HANDLER_H_
 #define CHROME_BROWSER_UI_APP_MODAL_DIALOGS_MESSAGE_BOX_HANDLER_H_
 #pragma once
 
-#include <string>
+namespace content {
+  class JavaScriptDialogCreator;
+}
 
-#include "ipc/ipc_message.h"
-
-class GURL;
-class JavaScriptAppModalDialogDelegate;
-class TabContents;
-class Profile;
-
-// Creates and runs a Javascript Message Box dialog.
-// The dialog type is specified within |dialog_flags|, the
-// default static display text is in |message_text| and if the dialog box is
-// a user input prompt() box, the default text for the text field is in
-// |default_prompt_text|. The result of the operation is returned using
-// |reply_msg|.
-void RunJavascriptMessageBox(Profile* profile,
-                             JavaScriptAppModalDialogDelegate* delegate,
-                             const GURL& frame_url,
-                             int dialog_flags,
-                             const std::wstring& message_text,
-                             const std::wstring& default_prompt_text,
-                             bool display_suppress_checkbox,
-                             IPC::Message* reply_msg);
-
-// This will display a modal dialog box with a header and footer asking the
-// the user if they wish to navigate away from a page, with additional text
-// |message_text| between the header and footer. The users response is
-// returned to the renderer using |reply_msg|.
-void RunBeforeUnloadDialog(TabContents* tab_contents,
-                           const std::wstring& message_text,
-                           IPC::Message* reply_msg);
+// Returns a JavaScriptDialogCreator that creates real dialogs.
+content::JavaScriptDialogCreator* GetJavaScriptDialogCreatorInstance();
 
 #endif  // CHROME_BROWSER_UI_APP_MODAL_DIALOGS_MESSAGE_BOX_HANDLER_H_