Avoid creating GM test resources at startup time.

The `compositor_quads_xxxxxx` slides were attempting to create their
renderers at program startup time. These are now created in
onOnceBeforeDraw instead.

Change-Id: I5dd5844447bf87348cb88ee97aa4e03593eb07fe
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/389616
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
1 file changed