If you're using the SOTI Lockdown you might have some difficult. SOTI Lockdown in Android+, as I understand it, leverages a Webview to display the lockdown UI. If you were to disable Chrome and the webview on the device you may end up in a funky state of sorts where the lockdown will fail to display. You also may have other unintended consequences caused by disabling chrome and webviews within apps that leverage them without you realizing it. I would maybe explore an alternative to adobe for PDF viewing (assuming that's what you're doing) before I tried disabling all device browsers.