UserAgent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36

Steps to reproduce the problem:
1. Run the selenium script which has code to disable pdf viewer
2. And observe that PDF is downloaded not opened in the new Tab of chrome
3. but PDf opened in new tab

What is the expected behavior?
PDF should be downloaded instead of opening in new tab

What went wrong?
after chrome driver update this code is not working

Did this work before? N/A 

Chrome version: 57.0.2987.133  Channel: n/a
OS Version: 6.3
Flash Version: Shockwave Flash 25.0 r0

Code which i used to disable pdf viewer
options.AddUserProfilePreference("download.default_directory", @"C:\temp");
                if (disableBrowserPDFViewer)
                {
                    options.AddUserProfilePreference("profile.default_content_settings.popups", 0);
                    options.AddUserProfilePreference("download.prompt_for_download", true);
                    options.AddUserProfilePreference("plugins.plugins_disabled", new[] { "Chrome PDF Viewer" });
                    //options.AddUserProfilePreference("plugins.plugins_disabled", new[] { "Chrome PDF Viewer" });
                    //options.AddUserProfilePreference("plugins.always_open_pdf_externally", false);
                }