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This is a reland of 0b825660

Original change's description:
> ExternalVkImageBacking: reuse more VkSemaphores.
> 
> This CL change SharedImageRepresentationSkia::BeginScoped*Access()'s
> definition to not pass semaphores's ownership to caller. So the caller
> will not release any semaphores, so shared image backings can reuse or
> release them.
> 
> Bug: 1004772
> Change-Id: Idfbcf61571a56be6acc8c80ee838ff0e119ba8bf
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2323562
> Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
> Commit-Queue: Peng Huang <penghuang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#793261}

Bug: 1004772
Change-Id: I2e3d41a29f2f3f45daf0d37cd09df2884a1b9189
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2331293
Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org>
Auto-Submit: Peng Huang <penghuang@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#793567}