tree a84cb0b24ee663ff7c3ea7083d95577de9a56919
parent a65ddf3b5a266a6bae3a04192e6b00fd3f4826ea
author Ian Zerny <zerny@google.com> 1590576491 +0200
committer Ian Zerny <zerny@google.com> 1590576515 +0000

Reland "Introduce a structure of preservation requirements for program items."

The reverts and merges the previous CL. To fix the issue for the revert,
keep-info bottom is used for non-program classes.

Bug: 156715504
Bug: 157538235
Change-Id: I6717e897bc8512ad3d2e5a4b3368a13de677ce5f