Update DevTools DEPS (trusted)

Rolling third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/3aee16b..d29cc8d

Roll created at https://cr-buildbucket.appspot.com/build/8695327614455512065

Bug: none
Change-Id: Ifa54ccb45a4666a9b14e023f0455ffce21d5c2d5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7262557
Commit-Queue: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: 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': '0b82a1d7bd15ca14932202544e76dbe395a8a41a',
 
   'depot_tools_url': 'https://chromium.googlesource.com/chromium/tools/depot_tools.git',
-  'depot_tools_revision': '3aee16b5f6617d13aa30f626bed87b234ecc2570',
+  'depot_tools_revision': 'd29cc8d7bb26ed24637242cc94cf57565ea33042',
 
   'inspector_protocol_url': 'https://chromium.googlesource.com/deps/inspector_protocol',
   'inspector_protocol_revision': '679b33a98ae546ff521eee2ea28d8d5bf28872ba',