Add Clearifying comment about Occlusion Query Test

Bug: angleproject:6752
Change-Id: I710273c43694b50ab4fb59a840ae15d6cb14391d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3469718
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
diff --git a/src/tests/gl_tests/OcclusionQueriesTest.cpp b/src/tests/gl_tests/OcclusionQueriesTest.cpp
index 50c7a8f..953beba 100644
--- a/src/tests/gl_tests/OcclusionQueriesTest.cpp
+++ b/src/tests/gl_tests/OcclusionQueriesTest.cpp
@@ -793,6 +793,8 @@
         EGL_NONE,
     };
 
+    // The following GL objects are implicitly deleted in
+    // ContextInfo's destructor before the EGLContext is manually destroyed
     struct ContextInfo
     {
         EGLContext context;