Update DevTools DEPS (trusted)

Rolling buildtools/linux64: git_revision:635a71e20e99db0b08520ca0746b501167a5c7e5..git_revision:c4748415f12ac92d2781608b8b84fcc0e33e5ff9

Rolling buildtools/mac: git_revision:635a71e20e99db0b08520ca0746b501167a5c7e5..git_revision:c4748415f12ac92d2781608b8b84fcc0e33e5ff9

Rolling buildtools/win: git_revision:635a71e20e99db0b08520ca0746b501167a5c7e5..git_revision:c4748415f12ac92d2781608b8b84fcc0e33e5ff9

Roll created at https://cr-buildbucket.appspot.com/build/8709585311926406129

Bug: none
Change-Id: I3bd49459ff8b86ed501eace923128beac13ffc68
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6731857
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

@@ -32,7 +32,7 @@ vars = {
   'emscripten_tag': 'ade9d780ff17c88d81aa13860361743e3c1e1396',
 
   # GN CIPD package version.
-  'gn_version': 'git_revision:635a71e20e99db0b08520ca0746b501167a5c7e5',
+  'gn_version': 'git_revision:c4748415f12ac92d2781608b8b84fcc0e33e5ff9',
 
   'cmake_version': 'version:[email protected]',