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With deferral enabled we can get a lot of resource thrash when
intermediate canvases and contexts are created, updated and drawn
to a target canvas multiple times in a tight loop.

Add a perf test for this.

Bug: 1049491
Change-Id: I360ed39a36027bd6efafddee5582a64b90eb3ae7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2053727Reviewed-by: Khushal <khushalsagar@chromium.org>
Reviewed-by: Aaron Krajeski <aaronhk@chromium.org>
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Commit-Queue: Aaron Krajeski <aaronhk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741517}