SkSLSlide: Guard against asserts in the compiler

Before compiling, write the shader text to 'sksl.bak', then remove it if
we succeed. This avoids loss-of-work if you manage to uncover an assert.

Change-Id: Idec7740210ce56cc9522c31e79f6aae1d4c3da1d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/343425
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
1 file changed