Roll src/third_party/depot_tools 7211cf64444c..6a5cb2517a2c (1 commits)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/7211cf64444c..6a5cb2517a2c

git log 7211cf64444c..6a5cb2517a2c --date=short --no-merges --format='%ad %ae %s'
2019-09-25 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

Created with:
  gclient setdep -r src/third_party/depot_tools@6a5cb2517a2c

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: None
Change-Id: I49d4d967b92fc4e4e041ae6e42e6724087a9936c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1825694Reviewed-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@{#699938}

DEPS

@@ -878,7 +878,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '7211cf64444c3cac9fba34d32ca35de31a96f545',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '6a5cb2517a2c219d303ab0ab2435f2e406738770',
 
   'src/third_party/devtools-node-modules':
     Var('chromium_git') + '/external/github.com/ChromeDevTools/devtools-node-modules' + '@' + Var('devtools_node_modules_revision'),