Roll recipe dependencies (trivial).

This is an automated CL created by the recipe roller. This CL rolls recipe
changes from upstream projects (e.g. depot_tools) into downstream projects
(e.g. tools/build).


More info is at https://goo.gl/zkKdpD. Use https://goo.gl/noib3a to file a bug.
depot_tools:
  https://crrev.com/5b593358a92367ac5f8dc80f1a853aa972356a12 gclient flatten: skip empty fields (phajdan.jr@chromium.org)
  https://crrev.com/665a4398b54fdee66c2c9d16c88823c7c55f2e6b git-cl-upload: warn if no rietveld project specified (agable@chromium.org)
  https://crrev.com/021372392977ab78a41c18e99897e64589385e7b Rietveld upload.py: send remote url instead of root hash (agable@chromium.org)
  https://crrev.com/897bf0b0836110c11866f745c2dc5f506b864d56 git-drover: send mail and don't use WIP mode (agable@chromium.org)


TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Icd57b3706904036e9cb3628ff8628b0061d690e4
Reviewed-on: https://skia-review.googlesource.com/21344
Reviewed-by: Recipe Roller <recipe-roller@chromium.org>
Commit-Queue: Recipe Roller <recipe-roller@chromium.org>
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index 19a6055..dba836b 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -14,7 +14,7 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "27e86ea28cb1ab7367f91e8fb4601f86441efbf1",
+      "revision": "897bf0b0836110c11866f745c2dc5f506b864d56",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {