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This reverts commit a37811d1.

Reason for revert: 
https://chromium-swarm.appspot.com/task?id=4e4ecbbb4657b710#ScreenshotSync_GPURasterWithDivs,ScreenshotSync_SWRasterWithDivs

Original change's description:
> SkiaOutputDevice: use buffer format passed to Reshape
> 
> Bug: 1108406
> Change-Id: Iaca79e3b6c1d66e421711c46f75a1cb614b7f961
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2378745
> Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
> Commit-Queue: Peng Huang <penghuang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#802450}

TBR=penghuang@chromium.org,vasilyt@chromium.org

Change-Id: Idd1c5aaca95ede1e052e72fd19e8b590ed21c79a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1108406
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2382056Reviewed-by: Peng Huang <penghuang@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802699}