Roll Depot Tools from 002f97b35a72 to 620c56e90e03 (1 revision)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/002f97b35a72..620c56e90e03

2020-05-19 zhin@google.com Fix git cl completion

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: None
Tbr: agable@chromium.org
Change-Id: I0fe72de07d2ce0ac3b5f2f471b7f20fd359b9f29
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2209554Reviewed-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@{#770333}

DEPS

@@ -871,7 +871,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '002f97b35a726ac34335376cc2c5637d31ae2f69',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '620c56e90e0392d85004ee5efb10e2f4e53c4984',
 
   'src/third_party/devtools-frontend/src':
     Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),