Roll src/third_party/depot_tools 314adcb844e1..fdb59f0d9088 (3 commits)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/314adcb844e1..fdb59f0d9088

git log 314adcb844e1..fdb59f0d9088 --date=short --no-merges --format='%ad %ae %s'
2019-09-23 tandrii@google.com Revert "git-cache: don't limit pack files to 2GiB."
2019-09-23 rharrison@chromium.org Add Dawn to projects for my_activity.py
2019-09-23 qyearsley@chromium.org Remove some unused private things in git_cl

Created with:
  gclient setdep -r src/third_party/depot_tools@fdb59f0d9088

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: I3c71eb86c8026762ef5fdfd99aec8c7da028a915
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1819107Reviewed-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@{#699017}

DEPS

@@ -878,7 +878,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '314adcb844e176d0789dede41827d7df5d35bd70',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + 'fdb59f0d9088922c75c74152613bc437e8468efc',
 
   'src/third_party/devtools-node-modules':
     Var('chromium_git') + '/external/github.com/ChromeDevTools/devtools-node-modules' + '@' + Var('devtools_node_modules_revision'),