tree f5dd24c6b3d95ae0dc2b6cb8bc3415f9277574e1
parent 6540ff4e174033da1fe10ff697d21d34ed66e3b7
author Elliott Hughes <enh@google.com> 1572652066 -0700
committer Elliott Hughes <enh@google.com> 1572652066 -0700

Header improvements.

Remove some __INTRODUCED_IN(16)s, since we don't support anything lower
than 16, so that's a no-op. And add the missing doc comments to those
headers while we're there.

Test: treehugger
Change-Id: I0328c530675564f0f1124bd483da05ad06df3507