Fix "unused variable" warnings.

content/shell/browser/shell_javascript_dialog.h

 // Copyright 2013 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 CONTENT_SHELL_BROWSER_SHELL_JAVASCRIPT_DIALOG_H_
 #define CONTENT_SHELL_BROWSER_SHELL_JAVASCRIPT_DIALOG_H_
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "content/public/browser/javascript_dialog_manager.h"
@@ skipping 18 matching lines @@
       JavaScriptMessageType message_type,
       const base::string16& message_text,
       const base::string16& default_prompt_text,
       const JavaScriptDialogManager::DialogClosedCallback& callback);
   ~ShellJavaScriptDialog();
 
   // Called to cancel a dialog mid-flight.
   void Cancel();
 
  private:
-  ShellJavaScriptDialogManager* manager_;
   JavaScriptDialogManager::DialogClosedCallback callback_;
 
 #if defined(OS_MACOSX)
   ShellJavaScriptDialogHelper* helper_;  // owned
 #elif defined(OS_WIN)
+  ShellJavaScriptDialogManager* manager_;
   JavaScriptMessageType message_type_;
   HWND dialog_win_;
   base::string16 message_text_;
   base::string16 default_prompt_text_;
   static INT_PTR CALLBACK DialogProc(HWND dialog, UINT message, WPARAM wparam,
                                      LPARAM lparam);
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ShellJavaScriptDialog);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_SHELL_JAVASCRIPT_DIALOG_H_