Fix ownership of Chrome OS inline login UI

Set per-file ownership of:
- chrome/browser/ui/webui/signin/inline_login_handler_impl.{h,cc}
- chrome/browser/ui/webui/signin/inline_login_dialog_chromeos.{h,cc}

to the OWNERs of Chrome OS Account Manager.

Fixed: 1129352
Change-Id: Iff179cef7daa8a405ba5c0c81940559aa10c4da1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416448Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Kush Sinha <sinhak@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808813}

chrome/browser/ui/webui/signin/OWNERS

@@ -5,4 +5,6 @@ xiyuan@chromium.org
 per-file inline_login_handler_impl*=file://chrome/credential_provider/OWNERS
 per-file inline_login_handler.*=file://chrome/credential_provider/OWNERS
 
+per-file inline_login_*_chromeos.*=file://chromeos/components/account_manager/OWNERS
+
 # COMPONENT: Services>SignIn