Roll src/third_party/depot_tools a01816b0bae9..b71a96f818c6 (1 commits)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/a01816b0bae9..b71a96f818c6

git log a01816b0bae9..b71a96f818c6 --date=short --first-parent --format='%ad %ae %s'
2020-04-14 yiwzhang@google.com Replace customzied test failure assertion with ResultReasonRE from engine

Created with:
  gclient setdep -r src/third_party/depot_tools@b71a96f818c6

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: I2700144d3fd99e32f695e7dc75c8d4b2ed628a18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2148477Reviewed-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@{#758725}

DEPS

@@ -881,7 +881,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + 'a01816b0bae90d983e18bcd54893e5f0cb4c4aab',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + 'b71a96f818c66b5578fb7c4475b67ecdcb16937a',
 
   'src/third_party/devtools-frontend/src':
     Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),