Add component to OWNERS and fixup repo URL in README.chromium

BUG=chromium:870747

Change-Id: I678393ca29f934ecc23f0140d2d211fccf619a5f
Reviewed-on: https://dawn-review.googlesource.com/1640
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
diff --git a/OWNERS b/OWNERS
index 77a75dd..06bf566 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,2 +1,4 @@
 cwallez@chromium.org
 kainino@chromium.org
+
+# COMPONENT: Internals>GPU>Dawn
diff --git a/README.chromium b/README.chromium
index 7a680e9..e14cc8b 100644
--- a/README.chromium
+++ b/README.chromium
@@ -1,6 +1,6 @@
 Name: Dawn
 Short Name: dawn
-URL: https://github.com/google/nxt-standalone
+URL: https://dawn.googlesource.com/dawn
 License: Apache 2.0
 License File: LICENSE
 Security Critical: yes