Rename some kBackgroundColor constants to make them unique

In jumbo experiments in chrome/browser/ui, one of the problems
is that there are many kBackgroundColor variables in anonymous
namespaces that become the same anonymous namespaces in jumbo.

This patch gives those constants unique names, matching their
individual use.

Bug: 773275
Change-Id: I8746a88a32f64a0645fd88e850e39d22bc635e19
Reviewed-on: https://chromium-review.googlesource.com/1078814
Commit-Queue: Daniel Bratell <bratell@opera.com>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567021}
7 files changed