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The GrShaderCache::ScopedCacheUse needs to be acquired when using the
GrContext to scope the cache's use to a single client. Add it for the
overdraw_ddl draw in SkiaOutputSurface.

R=ericrk@chromium.org

Change-Id: I6849deed684fa486b0a44bb227ce04217b62cafc
Reviewed-on: https://chromium-review.googlesource.com/c/1394348
Commit-Queue: Khushal <khushalsagar@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619764}