Update DevTools DEPS (trusted)

Rolling third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/50eedb1..85ec271

Roll created at https://cr-buildbucket.appspot.com/build/8721419529791295553

Bug: none
Change-Id: If3ddc42f9cbf39c92e18eba919755300892da6e1
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6317028
Bot-Commit: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>

Author: devtools-ci-autoroll-builder

DEPS

@@ -18,7 +18,7 @@ vars = {
   'buildtools_revision': 'b248db940ef3dd7e5f4694ebf4d8a3f67aa0086d',
 
   'depot_tools_url': 'https://chromium.googlesource.com/chromium/tools/depot_tools.git',
-  'depot_tools_revision': '50eedb1b5a74772dd77f9fe6b1cd82e3c4c1d9a7',
+  'depot_tools_revision': '85ec2718b5a29990c7eb67778348c9f76a00f392',
 
   'inspector_protocol_url': 'https://chromium.googlesource.com/deps/inspector_protocol',
   'inspector_protocol_revision': '940abfc668be2591483f7132145593c6a047f3cf',