[automerger skipped] Retire FixedBuffer am: c57fe51f93 -s ours

am skip reason: Change-Id I51fc5cb2ea12dd3cc5868fb18429774a8493e12f with SHA-1 57e93517e4 is in history

Change-Id: Ibaa08300a6debd2d0516eca038f803f87ec6a583