Use Chromium ToT instead of lkcr

https://chromium.googlesource.com/chromium/src/+/lkcr has not been
updated in months now.
CT uses Chromium ToT and has rarely run into problems because of that.

Bug: skia:7917
Change-Id: I007b8f29b2320ffbc45ab5c5a75b081fbb8d7afa
Reviewed-on: https://skia-review.googlesource.com/128319
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
6 files changed