Fix leak of backend texture in GrContext_maxSurfaceSamplesForColorType test

Bug: skia:7729
Change-Id: I0e946f15e16a7f4e42d862ac468323f29d65357a
Reviewed-on: https://skia-review.googlesource.com/116182
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed