https://chromium.googlesource.com/chromium/src.git/+log/3bcc8fd7c291..6c5859c895f5

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/chromium-angle-autoroll
Please CC syoussefi@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Changed dependencies
* build: https://chromium.googlesource.com/chromium/src/build.git/+log/e353b02625..8870cb4120
* buildtools: https://chromium.googlesource.com/chromium/src/buildtools.git/+log/0b443d31ef..c793cca886
* testing: https://chromium.googlesource.com/chromium/src/testing/+log/a45949a818..a62f8260df
* third_party/android_deps: https://chromium.googlesource.com/chromium/src/third_party/android_deps/+log/42884eb2ac..887e8d9009
* third_party/catapult: https://chromium.googlesource.com/catapult.git/+log/{catapult_..d598390f02
* third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/a5b6b2f8b7..b508ecd932
* third_party/protobuf: https://chromium.googlesource.com/chromium/src/third_party/protobuf/+log/9523daa51d..82f8803671
* tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang.git/+log/0c64e8349d..09481f56be
* tools/mb: https://chromium.googlesource.com/chromium/src/tools/mb/+log/d5d794a9f5..94630dfc19
* tools/memory: https://chromium.googlesource.com/chromium/src/tools/memory/+log/71214b910d..84ad259424
No update to Clang.

Manually added tools/android/modularization/convenience/lookup_dep.py
from crrev.com/889754
And updated .gn to use python3 in GN build by default

Bug: angleproject:6042
Tbr: syoussefi@google.com
Change-Id: I00384f4d38d14b54778d334aec9c633f54d619bb
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2946825Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>