Update DevTools DEPS (trusted)

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/1851994..7728935

Roll created at https://cr-buildbucket.appspot.com/build/8728757893002726561

Bug: none
Change-Id: Id98e42b66fea22ca850a87a06efc3de03ddbcf09
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6091394
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': '185199402093309a1efdb19be1de33f247badaff',
+  'build_revision': '7728935fbc481bf0a6b7f5bcea7797f4b98c3014',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
   'buildtools_revision': '75f731e7de960aa9b37da90585ca6a522905bb86',