Roll src/third_party/depot_tools 3f79763629b4..8baaec47e3bd (2 commits)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/3f79763629b4..8baaec47e3bd

git log 3f79763629b4..8baaec47e3bd --date=short --no-merges --format='%ad %ae %s'
2019-09-18 vapier@chromium.org repo: pull in updates from latest release
2019-09-18 ehmaldonado@chromium.org Reland "depot_tools: Bootstrap Python 3 on Linux/Mac"

Created with:
  gclient setdep -r src/third_party/depot_tools@8baaec47e3bd

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/depot-tools-chromium-autoroll
Please CC agable@chromium.org 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/+/master/autoroll/README.md

TBR=agable@chromium.org

Bug: chromium:None,chromium:1002153
Change-Id: Idd8e153fe49050a8984d01065e3cae807e22dc93
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1811295Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#697774}

DEPS

@@ -878,7 +878,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '3f79763629b43de8cb139f857e386be25d0ba058',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '8baaec47e3bd78315b22ba62024c12641b11fa6c',
 
   'src/third_party/devtools-node-modules':
     Var('chromium_git') + '/external/github.com/ChromeDevTools/devtools-node-modules' + '@' + Var('devtools_node_modules_revision'),