Roll Depot Tools from 70c2cfd61548 to ceb64a4f57d1 (3 revisions)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/70c2cfd61548..ceb64a4f57d1

2020-06-17 eliribble@chromium.org Improve Python-3 compatibility of download_from_google_storage.py
2020-06-17 wnwen@chromium.org Support formatting python3 scripts (reland)
2020-06-17 weiweilin@google.com [lucicfg] Update v1.15.1 -> v1.15.2

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/+doc/master/autoroll/README.md

Bug: chromium:1062053,chromium:1066815,chromium:1095581
Tbr: agable@chromium.org
Change-Id: I05818a5691cf3f031ac25deb72de6cd05677c491
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2250481
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#779536}

DEPS

@@ -875,7 +875,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '70c2cfd61548008329a852652246d4e045cc4b75',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + 'ceb64a4f57d15c8f5796481eea65c5be885b611a',
 
   'src/third_party/devtools-frontend/src':
     Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),