Update DevTools DEPS (trusted)

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/10f9d4e..7a391a6

Roll created at https://cr-buildbucket.appspot.com/build/8733197145892191553

Bug: none
Change-Id: I772e5b75f746b3a906f7365980b93e786d9bdfe6
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5960858
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': '10f9d4ee47d93471f15b8802bf574b567e3a12a7',
+  'build_revision': '7a391a66bc334943f087ea55bf298eababa81b0f',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
   'buildtools_revision': '09ea565f4a93e516581892f574e86b17c6283faf',