Update DevTools DEPS (trusted)

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/774b608..34c0008

Roll created at https://cr-buildbucket.appspot.com/build/8733287741916076609

Bug: none
Change-Id: I1e76c74c4484536732ce6db64d6077b55aec8f34
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5954666
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': '774b6086430e0dad09f351a3d2deb0a8fe1c7eae',
+  'build_revision': '34c0008c115f799461e0ec8ae5922af3b78b9816',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
   'buildtools_revision': '09ea565f4a93e516581892f574e86b17c6283faf',