Update DevTools DEPS (trusted)

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/6ba1a09..60ca34d

Roll created at https://cr-buildbucket.appspot.com/build/8729788435120217793

Bug: none
Change-Id: I20419d8623f2f18f45650ef3cacc0c37a78478a5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6058435
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

@@ -12,7 +12,7 @@ vars = {
   'build_with_chromium': False,
 
   'build_url': 'https://chromium.googlesource.com/chromium/src/build.git',
-  'build_revision': '6ba1a099c85c98cb9fff145170fc2e7a39acc330',
+  'build_revision': '60ca34d40123c7aecf3ccc46e614627b9f8bc6a6',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
   'buildtools_revision': '49035b275195fba76169a20e6965996899ae3856',