GitLab

This CL combines VerifiedContents class instantiation and initializing
it from a file to a single static factory. Consumer of
VerifiedContents always requires both, so it's slightly better with
the factory.

Bug: None
Test: None, internal cleanup.
Change-Id: I8938433c7f95b93425c25f5fda0299d23cfa65e3
Reviewed-on: https://chromium-review.googlesource.com/1149411Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Istiaque Ahmed <lazyboy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578000}