Roll recipe dependencies (trivial).

This is an automated CL created by the recipe roller. This CL rolls
recipe changes from upstream projects (depot_tools) into this repository.

depot_tools:
https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/39120911526720e9256b724b1f44513bab3cb533
  3912091 (sokcevic@google.com)
      Use py3 for remaining tools in depot_tools path

More info is at https://goo.gl/zkKdpD. Use https://goo.gl/noib3a to file a bug.

R=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: I756315d83c2e7764cd57223192a01fe8ff2d7c95
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/430596
Commit-Queue: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
diff --git a/infra/bots/README.recipes.md b/infra/bots/README.recipes.md
index 48b4d38..afbc337 100644
--- a/infra/bots/README.recipes.md
+++ b/infra/bots/README.recipes.md
@@ -503,10 +503,10 @@
 
 &mdash; **def [RunSteps](/infra/bots/recipe_modules/vars/examples/full.py#15)(api):**
 
-[depot_tools/recipe_modules/bot_update]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/61c72651d70bbcae85e4995a5f6ae0ce696044f3/recipes/README.recipes.md#recipe_modules-bot_update
-[depot_tools/recipe_modules/gclient]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/61c72651d70bbcae85e4995a5f6ae0ce696044f3/recipes/README.recipes.md#recipe_modules-gclient
-[depot_tools/recipe_modules/git]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/61c72651d70bbcae85e4995a5f6ae0ce696044f3/recipes/README.recipes.md#recipe_modules-git
-[depot_tools/recipe_modules/tryserver]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/61c72651d70bbcae85e4995a5f6ae0ce696044f3/recipes/README.recipes.md#recipe_modules-tryserver
+[depot_tools/recipe_modules/bot_update]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/39120911526720e9256b724b1f44513bab3cb533/recipes/README.recipes.md#recipe_modules-bot_update
+[depot_tools/recipe_modules/gclient]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/39120911526720e9256b724b1f44513bab3cb533/recipes/README.recipes.md#recipe_modules-gclient
+[depot_tools/recipe_modules/git]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/39120911526720e9256b724b1f44513bab3cb533/recipes/README.recipes.md#recipe_modules-git
+[depot_tools/recipe_modules/tryserver]: https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/39120911526720e9256b724b1f44513bab3cb533/recipes/README.recipes.md#recipe_modules-tryserver
 [recipe_engine/recipe_modules/context]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/8e0273d1386a0d58093730a508604d66f063961c/README.recipes.md#recipe_modules-context
 [recipe_engine/recipe_modules/file]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/8e0273d1386a0d58093730a508604d66f063961c/README.recipes.md#recipe_modules-file
 [recipe_engine/recipe_modules/json]: https://chromium.googlesource.com/infra/luci/recipes-py.git/+/8e0273d1386a0d58093730a508604d66f063961c/README.recipes.md#recipe_modules-json
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index b69c568..0c9976c1 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -14,7 +14,7 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "61c72651d70bbcae85e4995a5f6ae0ce696044f3",
+      "revision": "39120911526720e9256b724b1f44513bab3cb533",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {