Rename some kButtonPadding constants to make them unique

In jumbo all files are merged into a single (or many) larger
translation unit and then a couple of kButtonPadding variables
end up in same anonymous namespace so that they clash.

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

Bug: 773275
Change-Id: I9d8be1076552b7ffaa095bb4d50d3fa3d5845274
Reviewed-on: https://chromium-review.googlesource.com/1078816
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#566957}
2 files changed