The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/81a52b8fb7cd52aa628556bdd6b6453555ec42af

commit 81a52b8fb7cd52aa628556bdd6b6453555ec42af
Author: Xianzhu Wang <wangxianzhu@chromium.org>
Date: Fri Jan 18 20:56:47 2019

[CompositeAfterPaint] Unskip external/wpt/

Bug: 524134,923429
Change-Id: Ia87abca3ea20595e9057dd6fdccffea31e9cfacb
Reviewed-on: https://chromium-review.googlesource.com/c/1422757
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624279}
[modify] https://crrev.com/81a52b8fb7cd52aa628556bdd6b6453555ec42af/third_party/blink/web_tests/FlagExpectations/enable-blink-features=CompositeAfterPaint
[modify] https://crrev.com/81a52b8fb7cd52aa628556bdd6b6453555ec42af/third_party/blink/web_tests/flag-specific/enable-blink-features=CompositeAfterPaint/svg/W3C-SVG-1.1/masking-mask-01-b-expected.png