Chrome 51 and up now has built-in casting capability. Unfortunately, it is not appearing for me. Here is what my version of Chrome says is its version number:
I have a Nexus Player on the same network which I've used to chrome cast for many months. It works very reliably. Everything, like YouTube, Google Photos and other computers with an old Chrome browser + Google Cast extension, can connect to it except this Chrome browser. The option simply doesn't show up:
Does anyone have an idea what may be wrong or a suggestion on how to resolve?