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With deferral enabled a canvas rendering context can create an
unlimited amount of GPU resources between frames. This class allows us
to track how much memory is being pinned and to flush the recording
after we pass a certain threshold.

Bug: 1016727, 1015729
Change-Id: I3a64dc07cc0239447aa721ea2a7cc808541a0a36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1960469Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Aaron Krajeski <aaronhk@chromium.org>
Reviewed-by: Yi Xu <yiyix@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Reviewed-by: Juanmi Huertas <juanmihd@chromium.org>
Commit-Queue: Aaron Krajeski <aaronhk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726085}