Notable changes in upstream CEF:

• Fix print to PDF - upstream #2129
• Add PDF print scale factor setting - upstream #2106
• Fix DevTools inspect element at - upstream #2115
• Fix opening of popups from sandboxed iframes - upstream #2121
• Fix crash when navigating back to file url - upstream #2125
• Don't call OnLoadEnd for same page navigations - usptream #1852
• Persist DevTools preferences with CefSettings.persist_user_preferences - upstream #2077
• Fix crash on shutdown with multi_threaded_message_loop and extensions enabled on Windows - upstream #1680
• Fix OSR popup transparency - upstream #2099

CEF commit:
https://bitbucket.org/chromiumembedded/cef/commits/495fb8c0b7818138ad0ec9656cb0c5963893ffcf