Enable presubmit for callbacks in //chromeos/components

This directory has been fully converted to choose between Once and
Repeating for all callback types and calls to base::Bind().

Bug: 1007654
Change-Id: I9fd5a20aea036e0e5f6e93a7eed325b8c2a7cc69
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2641159
Auto-Submit: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845692}

PRESUBMIT.py

@@ -375,7 +375,6 @@ _NOT_CONVERTED_TO_MODERN_BIND_AND_CALLBACK = '|'.join((
   '^chrome/browser/translate/',
   '^chrome/browser/web_applications/',
   '^chrome/browser/win/',
-  '^chromeos/components/',
   '^components/drive/',
   '^components/search_engines/',
   '^components/webcrypto/',