Roll Depot Tools from 02f6b66357eb to 6c484875cdcb (3 revisions)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/02f6b66357eb..6c484875cdcb

2020-08-28 gbeaty@chromium.org Ensure all keys in the bot_update revisions dict use forward slash.
2020-08-28 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-08-28 gbeaty@chromium.org Output a newline when there are warnings and no prompt.

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 ajp@google.com,apolito@google.com,ehmaldonado@google.com,sokcevic@google.com 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/+doc/master/autoroll/README.md

Bug: chromium:1047893
Tbr: ajp@google.com,apolito@google.com,ehmaldonado@google.com,sokcevic@google.com
Change-Id: I30fb0762c998ae277263bf4fa8f45b1bba709ada
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2382692Reviewed-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@{#802825}

DEPS

@@ -896,7 +896,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '02f6b66357ebdef8675017d91ac2fdef51f78f51',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '6c484875cdcbfeba43a4fae0106a1be8ca65eff1',
 
   'src/third_party/devtools-frontend/src':
     Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),