Roll src/third_party/depot_tools 8aebb60a8d9d..888c0fe76833 (1 commits)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/8aebb60a8d9d..888c0fe76833

git log 8aebb60a8d9d..888c0fe76833 --date=short --first-parent --format='%ad %ae %s'
2020-04-17 engeg@google.com ReadHttpResponse: Handle 429s with retries and adjust retry count

Created with:
  gclient setdep -r src/third_party/depot_tools@888c0fe76833

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: chromium:1071590
Tbr: agable@chromium.org
Change-Id: Ia024c1e891c9bcf8d06ad45d18cec2da4da2191f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2154807Reviewed-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@{#760100}

DEPS

@@ -868,7 +868,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '8aebb60a8d9ddf771e183996a5ec343bdd9633e2',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '888c0fe768332056df2cd79d08226fff9a2b20e9',
 
   'src/third_party/devtools-frontend/src':
     Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),