Revert "Fix backdrop_filter_bounds location for clipped layers"

This reverts commit ceacea9fdf00cc98371f5faefc05c7e1f4a0f81a.

Reason for revert: Broke all Mac tests, see https://ci.chromium.org/p/chromium/builders/ci/WebKit%20Mac10.13%20%28retina%29/14040

Original change's description:
> Fix backdrop_filter_bounds location for clipped layers
> 
> Previous to this CL, the location of the backdrop filter bounds
> rect was incorrect when the containing layer was clipped by the
> viewport. In that case, the offset added to the backdrop filter
> bounds transform did not account for the clip. It now does, which
> should fix at least four bugs.
> 
> Bug: 618913, 927097, 932160, 940917
> Change-Id: I0dc1e4c3dde61210d8f7aa78b2e20f13fc8a2471
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1602812
> Commit-Queue: Mason Freed <masonfreed@chromium.org>
> Reviewed-by: enne <enne@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#658920}

TBR=enne@chromium.org,masonfreed@chromium.org

Change-Id: Ie49f6746ca5ca9edfebc18c7aeb32f74d3bd6662
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 618913, 927097, 932160, 940917
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1608700
Reviewed-by: Dominic Battré <battre@chromium.org>
Commit-Queue: Dominic Battré <battre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658936}
15 files changed