Give a global factory a globally unique name

There are two g_previews_factory now which causes issues with
some jumbo builds. This renames one of them
g_previews_service_factory.

Change-Id: I05d4ab366239888e80fb32f782ac4e4880a8609f
Reviewed-on: https://chromium-review.googlesource.com/1122131
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#572143}
1 file changed