Roll src/third_party/depot_tools 816c2b3548fb..6c6827cbf27d (3 commits)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/816c2b3548fb..6c6827cbf27d

git log 816c2b3548fb..6c6827cbf27d --date=short --first-parent --format='%ad %ae %s'
2020-02-06 ehmaldonado@google.com git-cl: Simplify FetchDescription and UpdateDescription
2020-02-06 ehmaldonado@google.com git-cl: Remove GetDescriptionFooters and UpdateDescriptionFooters
2020-02-06 ehmaldonado@google.com git-cl: Simplify Change object construction.

Created with:
  gclient setdep -r src/third_party/depot_tools@6c6827cbf27d

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:1042324
Tbr: agable@chromium.org
Change-Id: I687d022f4e77369cd25805a9e24aedbbc838123f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2042776Reviewed-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@{#739213}

DEPS

@@ -894,7 +894,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '816c2b3548fbb7c48a876484faac3e5f39c9416d',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '6c6827cbf27df9964f0c8a1fd069f2d31a10b210',
 
   'src/third_party/devtools-frontend/src':
     Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),