Re-enable dark mode CSS PRESUBMIT check

Bug: chromium:1188524
Change-Id: Ic599036e5c861c016574665fbd1b419d9e1cd0b9
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2782552
Commit-Queue: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
Auto-Submit: Jack Franklin <jacktfranklin@chromium.org>
Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org>
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index d7b41da..40fb6da 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -484,8 +484,7 @@
     results.extend(_CheckDevToolsStyleJS(input_api, output_api))
     results.extend(_CheckDevToolsStyleCSS(input_api, output_api))
 
-    # TODO(jacktfranklin) re-enable. Temporarily disabled due to CSS generation bug. See crbug.com/1188524 for details.
-    # results.extend(_CheckDarkModeStyleSheetsUpToDate(input_api, output_api))
+    results.extend(_CheckDarkModeStyleSheetsUpToDate(input_api, output_api))
     results.extend(_CheckFormat(input_api, output_api))
     results.extend(_CheckOptimizeSVGHashes(input_api, output_api))
     results.extend(_CheckChangesAreExclusiveToDirectory(input_api, output_api))