Add DIR_METADATA files to //components/nacl

Generate DIR_METADATA files and remove metadata from OWNERS files for
//components/nacl

Bug: 1113033
Change-Id: Ic29fd8502723d94dc62bb6613f26292f29c4fed3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2544904Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Norman Rosas <normando@google.com>
Cr-Commit-Position: refs/heads/master@{#828387}

components/nacl/DIR_METADATA

+monorail {
+  component: "Platform>NaCl"
+}
+team_email: "chromium-reviews@chromium.org"
\ No newline at end of file

components/nacl/OWNERS

 bradnelson@chromium.org
 dschuff@chromium.org
 mseaborn@chromium.org
-
-# COMPONENT: Platform>NaCl
-# TEAM: chromium-reviews@chromium.org

components/nacl/loader/nonsfi/DIR_METADATA

+monorail {
+  component: "Platform>NaCl"
+}
\ No newline at end of file

components/nacl/loader/nonsfi/OWNERS

@@ -2,5 +2,3 @@ hidehiko@chromium.org
 
 per-file nonsfi_sandbox*=jln@chromium.org
 per-file nonsfi_sandbox*=mseaborn@chromium.org
-
-# COMPONENT: Platform>NaCl

components/nacl/loader/sandbox_linux/DIR_METADATA

+monorail {
+  component: "Platform>NaCl"
+}
\ No newline at end of file

components/nacl/loader/sandbox_linux/OWNERS

 jln@chromium.org
 mseaborn@chromium.org
-
-# COMPONENT: Platform>NaCl