Update DevTools DEPS (trusted)

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/636ceb6..68e24a5

Roll created at https://cr-buildbucket.appspot.com/build/8730932218299195585

Bug: none
Change-Id: I64e8e10ad1c6ee96d83a018136779299358325b5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6030869
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

@@ -12,7 +12,7 @@ vars = {
   'build_with_chromium': False,
 
   'build_url': 'https://chromium.googlesource.com/chromium/src/build.git',
-  'build_revision': '636ceb6dea83e899eb5d168a32c293bf85c3bb5c',
+  'build_revision': '68e24a5b90bd32a12a46885f28f9f61d38ad33c8',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
   'buildtools_revision': '1760ff6d7267dd97ae1968c7bee9ce04a2a8489d',