Fix pixmap OWNERS to match client_native_pixmap_factory.*

Bug: none
Test: none

Change-Id: I8ec80e17c394d68bfb4bdbd4813f58054dee5615

Reviewed-on: https://chromium-review.googlesource.com/c/1284853
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600952}

ui/gfx/OWNERS

@@ -41,8 +41,8 @@ per-file *buffer_types.*=reveman@chromium.org
 per-file *buffer_types.*=dcastagna@chromium.org
 per-file *buffer_types.*=rjkroege@chromium.org
 per-file *buffer_types.*=spang@chromium.org
-per-file *pixmap.*=rjkroege@chromium.org
-per-file *pixmap.*=spang@chromium.org
+per-file *native_pixmap*=rjkroege@chromium.org
+per-file *native_pixmap*=spang@chromium.org
 
 # Vector icons.
 per-file *vector_icon*=estade@chromium.org