Update DevTools DEPS (trusted)

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/a53bdd1..77a7f61

Roll created at https://cr-buildbucket.appspot.com/build/8702609344088649281

Bug: none
Change-Id: I0eae5bc03a02928fef3f91c63b9f6073e4fa9fb6
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6990287
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': 'a53bdd1c49678a892515853771e640e6cb65d657',
+  'build_revision': '77a7f61926effc28ee272b8ce64042e44cea7018',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
   'buildtools_revision': '6b7117dcf645245b6c137eb6c61dfe17d4952707',