Add to OWNERS for ozone types in ui/gfx

Add rjkroege to OWNERS for ozone-related types in ui/gfx.

Bug: none
Change-Id: I55a20958419555b46842f60269136a95e9901088
Reviewed-on: https://chromium-review.googlesource.com/1249833
Commit-Queue: Robert Kroeger <rjkroege@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595346}

ui/gfx/OWNERS

@@ -27,12 +27,17 @@ per-file skia_paint_util*=danakj@chromium.org
 # GPU memory buffer and GpuFence interfaces.
 per-file gpu_fence*=reveman@chromium.org
 per-file gpu_fence*=dcastagna@chromium.org
+per-file gpu_fence*=rjkroege@chromium.org
 per-file gpu_memory_buffer*=reveman@chromium.org
 per-file gpu_memory_buffer*=dcastagna@chromium.org
+per-file gpu_memory_buffer*=rjkroege@chromium.org
 per-file buffer_format*=reveman@chromium.org
 per-file buffer_format*=dcastagna@chromium.org
+per-file buffer_format*=rjkroege@chromium.org
 per-file *buffer_types.*=reveman@chromium.org
 per-file *buffer_types.*=dcastagna@chromium.org
+per-file *buffer_types.*=rjkroege@chromium.org
+per-file *pixmap.*=rjkroege@chromium.org
 
 # Vector icons.
 per-file *vector_icon*=estade@chromium.org

ui/gfx/linux/OWNERS

@@ -2,3 +2,4 @@ dcastagna@chromium.org
 dongseong.hwang@chromium.org
 dnicoara@chromium.org
 reveman@chromium.org
+rjkroege@chromium.org