Revert "[PE] Clear pagination offset on fragmentation update."

This reverts commit 30ec8698f41076b18fa68a99f8c07dcb070b24ac.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> [PE] Clear pagination offset on fragmentation update.
> 
> Previously there was a bug in which we left a stale pagination offset
> when an element became un-paginated.
> 
> TBR=chrishtr@chromium.org
> 
> (cherry picked from commit 59388664eb816df4b0757190da4e2d20d5989770)
> 
> Bug: 797751
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> Change-Id: I226f285f31c4ea1769870c73584916b8f1083441
> Reviewed-on: https://chromium-review.googlesource.com/846343
> Commit-Queue: Chris Harrelson <chrishtr@chromium.org>
> Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
> Cr-Original-Commit-Position: refs/heads/master@{#526356}
> Reviewed-on: https://chromium-review.googlesource.com/847307
> Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
> Cr-Commit-Position: refs/branch-heads/3282@{#385}
> Cr-Branched-From: 5fdc0fab22ce7efd32532ee989b223fa12f8171e-refs/heads/master@{#520840}

TBR=wangxianzhu@chromium.org,chrishtr@chromium.org

Change-Id: I7a3247f9f304f268e782e594fc2eb0d7774fe7b7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 797751
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Reviewed-on: https://chromium-review.googlesource.com/848512
Reviewed-by: Abdul Syed <abdulsyed@google.com>
Cr-Commit-Position: refs/branch-heads/3282@{#392}
Cr-Branched-From: 5fdc0fab22ce7efd32532ee989b223fa12f8171e-refs/heads/master@{#520840}
1 file changed