An updated compatible plugin is necessary!!!!
Am confused by what you expect Apple to do to reverse Chrome's NPAPI plug-in depreciation schedule timeline as published in 2013 and updated in 2014 which states:
January 2015
Currently Chrome supports NPAPI plugins, but they are blocked by default unless the user chooses to allow them for specific sites (via the page action UI). A small number of the most popular plugins are whitelisted and allowed by default. In January 2015 we will remove the whitelist, meaning all plugins will be blocked by default. Even though users will be able to let NPAPI plug-ins run by default in January, we encourage developers to migrate of off NPAPI as soon as possible. Support for NPAPI will be completely removed from Chrome by September 2015.
April 2015
In April 2015 (Chrome 42) NPAPI support will be disabled by default in Chrome and we will unpublish extensions requiring NPAPI plugins from the Chrome Web Store. All NPAPI plugins will appear as if they are not installed, as they will not appear in the navigator.plugins list nor will they be instantiated (even as a placeholder). Although plugin vendors are working hard to move to alternate technologies, a small number of users still rely on plugins that haven’t completed the transition yet. We will provide an override for advanced users (via chrome://flags/#enable-npapi) and enterprises (via Enterprise Policy) to temporarily re-enable NPAPI (via the page action UI) while they wait for mission-critical plugins to make the transition. In addition, setting any of the plugin Enterprise policies (e.g. EnabledPlugins, PluginsAllowedForUrls) will temporarily re-enable NPAPI.
September 2015
In September 2015 (Chrome 45) we will remove the override and NPAPI support will be permanently removed from Chrome. Installed extensions that require NPAPI plugins will no longer be able to load those plugins.
See article: http://www.chromium.org/developers/npapi-deprecation