netscape back in 1990s created a plugin API architecture, called NPAPI. That's what allows you to have (Macromedia) Flash, Apple's QuickTime (for video), display MathML, use Java applets, and hundreds of others. Now, Google is killing it, and pulling it out of Google Chrome.
This means, no more Java Applets. By the way, the Flash bundled with Google Chrome isn't using NPAPI.
Google cites security reasons for killing NPAPI.
〔Saying Goodbye to Our Old Friend NPAPI By Google. @ http://blog.chromium.org/2013/09/saying-goodbye-to-our-old-friend-npapi.html〕
some discussion on chromium-dev here: https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/xEbgvWE7wMk