tree 29c11cce95d8a96f1c1b0561fccbe495136b9569
parent 12233c5d55785ceaab0f5ad0e6edddd0020246a3
author Patrick Venture <venture@google.com> 1558026386 -0700
committer Patrick Venture <venture@google.com> 1558031459 -0700

tools: add update handler

Add an UpdateHandler to handle each step of the update process.

This code was already in place but is now handled via an UpdateHandler
object.

Tested: Not yet tested.
Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I36cd1b94d8e2c0788d09805d935738d86e6e33de