db27fb3064
The purpose of this class is to reindex the entire site, and it contains some behaviors that are really only appropriate for this scope, such as walking repositories to find lists of changed paths (rather than thrashing PatchListCache), and a synchronous call returning a results object. This is in contrast with ReindexAfterUpdate, which operates only on open changes in a single branch or project with an asynchronous interface. In fact, in each case where these different types of batch indexer can make different choices, they do, which is why they do not share implementation. The name "ChangeBatchIndexer", however, was too generic, and suggested that it might be able to fulfill the role of ReindexAfterUpdate when it can't. Change-Id: I049746f92d98c642022b3f6a14efe78afe799519