Add myself to OWNERS for WebGL and GPU command buffer

Change-Id: Ifbef2fe8be8ac43a82dccb0151f77048fc7ec664
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2073063
Auto-Submit: James Darpinian <jdarpinian@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744861}

gpu/command_buffer/OWNERS

@@ -2,6 +2,7 @@ bajones@chromium.org
 geofflang@chromium.org
 vmiura@chromium.org
 zmo@chromium.org
+jdarpinian@chromium.org
 
 # GPU memory buffer tests.
 per-file *gpu_memory_buffer*=reveman@chromium.org

third_party/blink/renderer/modules/webgl/OWNERS

@@ -2,5 +2,6 @@ bajones@chromium.org
 kainino@chromium.org
 kbr@chromium.org
 zmo@chromium.org
+jdarpinian@chromium.org
 
 # COMPONENT: Blink>WebGL