tree d90f5db9893415403996900ef079b0a08475a60b
parent ff620a096da78d120ed91d24fdac6618cfac7884
author Nina Ilieva <ninai@google.com> 1576197792 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1576197792 +0000

[cobalt[LocalAggregation] Make Observation History a protected field.

- moves obs_history in a ProtectedField<>
- Defines Get/Set methods for the *LastGeneratedDayIndex, so that it
separates accessing the underlying data structures from observation
generation
- Adds tests for Get/Set methods
- makes the methods pulic
- nit organization of the AggregateStore's private fields

Bug: 40853

Change-Id: I364b31f79c9c24d5784a77ed4d16fe26f63d9b57