GitLab

Extract header ASCII graphic emitting code (WriteAsciiHeader) out of
the histogram content drawing method (WriteAsciiImpl) to add more
flexibility in style setup.
Rename method [WriteAsciiImpl] to [WriteAsciiBody].
Move newline symbols to constants.

R=dcheng@chromium.org, sinhak@chromium.org

Bug: 1006447
Change-Id: If4af4c82efffaca10a0c34a9bb8abc98000235b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2019204
Commit-Queue: Andrei Salavei <solovey@google.com>
Reviewed-by: Kush Sinha <sinhak@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735388}