GitLab

These changes are behind the kReadLater feature flag. This cl updates
the read later string and adds capitalcase versions.

Bug: 1117023
Change-Id: I26d62e659b06a113e63c3c457cdef85ce366a126
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2402105Reviewed-by: Connie Wan <connily@chromium.org>
Commit-Queue: Caroline Rising <corising@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807053}