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>
 
+#include "base/string16.h"
 #include "ipc/ipc_message.h"
 
 class GURL;
-class JavaScriptAppModalDialogDelegate;
+class ChromeJavaScriptDialogDelegate;
 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,
+// |reply_msg|. TODO(avi): Remove Profile from this call; http://crbug.com/84601
+void RunJavascriptDialogImpl(Profile* profile,
+                             ChromeJavaScriptDialogDelegate* delegate,
                              const GURL& frame_url,
                              int dialog_flags,
-                             const std::wstring& message_text,
-                             const std::wstring& default_prompt_text,
+                             const string16& message_text,
+                             const string16& 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
+// |message_text| between the header and footer. The user's response is
 // returned to the renderer using |reply_msg|.
-void RunBeforeUnloadDialog(TabContents* tab_contents,
-                           const std::wstring& message_text,
-                           IPC::Message* reply_msg);
+void RunBeforeUnloadDialogImpl(ChromeJavaScriptDialogDelegate* delegate,
+                               const string16& message_text,
+                               IPC::Message* reply_msg);
 
 #endif  // CHROME_BROWSER_UI_APP_MODAL_DIALOGS_MESSAGE_BOX_HANDLER_H_