Roll src/third_party/depot_tools 17ffd9875c34..a680c23e7859 (3 commits)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/17ffd9875c34..a680c23e7859

git log 17ffd9875c34..a680c23e7859 --date=short --first-parent --format='%ad %ae %s'
2020-03-31 ehmaldonado@google.com git-cl: Fix checking if parent branch has been uploaded.
2020-03-31 ahaas@chromium.org [man] Fix order of depot_tools in PATH
2020-03-31 ehmaldonado@google.com git-cl: Move GCE detection when creating a connection.

Created with:
  gclient setdep -r src/third_party/depot_tools@a680c23e7859

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

Bug: None
Tbr: agable@chromium.org
Change-Id: I429219759bd40684408b8c78063d53c401a91ead
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2130828Reviewed-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@{#755110}

DEPS

@@ -877,7 +877,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '17ffd9875c34c9860265329e27a28a6ca2b85a18',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + 'a680c23e78599f7f0b761ada3158387a9e9a05b3',
 
   'src/third_party/devtools-frontend/src':
     Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),