jumbo build: Rename constants to be unique (storage/browser)

When building using jumbo, files gets merged and
constants with the same name may end up in the same
namespace/scope and conflict.

This commit solves the issue by renaming the constants
to something more file specific.

Bug: 871163
Change-Id: Ic4973b976597dbc097897406951ae8c2cbdf6430
Reviewed-on: https://chromium-review.googlesource.com/1163505
Commit-Queue: Oscar Johansson <oscarj@opera.com>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581535}
8 files changed