Run debug callback in perf render tests. This can catch unexpected GL errors from ANGLE or the system driver. Only enable when ASSERTs are enabled to ensure that we get full performance when profiling. Helpful to diagnose incorrect perf test rendering. In this case it helped diagnose that our frame tracing and replay do not correctly remap uniform locations. Bug: angleproject:3630 Change-Id: Ifd9f47196381e48f74a810ea0c9f9c0fd7a13a22 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2057352 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tobin Ehlis <tobine@google.com>