[jumbo] Give two kBackgroundColor in chrome/.../views unique names

In jumbo builds, many files are compiled in the same translation
unit and then they also share the same anonymous namespace. Then
it becomes a problem (does not compile) if several constants/
symbols are named the same.

This follows earlier patterns of giving shared generic names
prefixes.

Bug: 918788

Change-Id: If45d63b9bfe77119735c67fca491a6227dded045
Reviewed-on: https://chromium-review.googlesource.com/c/1424842
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#625147}
2 files changed