Resurrect SkDebugger

Can't let go <sniffle>.

R=robertphillips@google.com

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4793

Change-Id: Ida5936d17af2ef60c3f50e27b4f4987a79165fa5
Reviewed-on: https://skia-review.googlesource.com/4793
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
4 files changed