Create a PDF password dialog for Views.

chrome/browser/ui/pdf/pdf_tab_helper.h

 // Copyright (c) 2012 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_PDF_PDF_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_PDF_PDF_TAB_HELPER_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 43 matching lines @@
   void OnUpdateContentRestrictions(int content_restrictions);
   void OnModalPromptForPassword(const std::string& prompt,
                                 IPC::Message* reply_message);
 
   // The model for the confirmation prompt to open a PDF in Adobe Reader.
   scoped_ptr<OpenPDFInReaderPromptDelegate> open_in_reader_prompt_;
 
   DISALLOW_COPY_AND_ASSIGN(PDFTabHelper);
 };
 
-// TODO(avi): write for other platforms
-#if defined(OS_MACOSX)
+#if !defined(TOOLKIT_GTK)
 typedef base::Callback<void(bool /* success */,
                             const base::string16& /* password */)>
                                 PasswordDialogClosedCallback;
 
 // Shows a tab-modal dialog to get a password for a PDF document.
 void ShowPDFPasswordDialog(content::WebContents* web_contents,
                            const base::string16& prompt,
                            const PasswordDialogClosedCallback& callback);
-#endif  // OS_*
+#endif  // !TOOLKIT_GTK
 
 #endif  // CHROME_BROWSER_UI_PDF_PDF_TAB_HELPER_H_