Roll fwd ANGLE chromium DEPs Roll build, buildtools, clang, testing, googletest, zlib, gyp. Bug: angleproject:2560 Change-Id: Ic7f2a8bbdb9f6ff3bca1cd6d7ba424add7d086ad Reviewed-on: https://chromium-review.googlesource.com/1068064 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>