Web Share Target API

[zcorpan]

Request for Mozilla Position on an Emerging Web Specification

• Specification title: Web Share Target API
• Specification or proposal URL (if available): https://wicg.github.io/web-share-target/
• Explainer URL (if available):
• Proposal author(s) (@-mention GitHub accounts):
• Caniuse.com URL (optional):
• Bugzilla URL (optional): https://bugzilla.mozilla.org/show_bug.cgi?id=1476515
• Mozillians who can provide input (optional):
• WebKit standards-position:

Other information

This was split out from #27 -- see #1087

[zcorpan]

It turned out we did have an issue for this (#176), but activities.json pointed to the wrong issue.