Framework and tests for WorkerNavigatorBudget
This CL provides a Worker entrypoint for the BudgetAPI. The WorkerNavigator
partial interface provides a BudgetService object, which is the same for
both Navigator and WorkerNavigator.
BUG=
617971
Committed:
https://crrev.com/48002352c0a882279f25decc05b61c73c15795a5
Cr-Commit-Position: refs/heads/master@{#414579}