The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/33152a01a9e501b6f0d44d9bb72498f36968f933

commit 33152a01a9e501b6f0d44d9bb72498f36968f933
Author: Steve Kobes <skobes@chromium.org>
Date: Wed May 24 15:53:28 2017

Start converting scroll anchoring tests to web-platform-tests.

This patch converts three test cases (others will follow):
  ScrollAnchorTest.Basic
  ScrollAnchorTest.ClippedScrollersSkipped
  ScrollAnchorTest.AnchoringWhenContentRemoved

Bug:  725278 
Change-Id: I66f30372cdcd5a23333bc4e95fcb65ca5bd80cb4
Reviewed-on: https://chromium-review.googlesource.com/511883
Reviewed-by: Ojan Vafai <ojan@chromium.org>
Commit-Queue: Steve Kobes <skobes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#474305}
[add] https://crrev.com/33152a01a9e501b6f0d44d9bb72498f36968f933/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/README.md
[add] https://crrev.com/33152a01a9e501b6f0d44d9bb72498f36968f933/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/anchoring-with-bounds-clamping.html
[add] https://crrev.com/33152a01a9e501b6f0d44d9bb72498f36968f933/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/basic.html
[add] https://crrev.com/33152a01a9e501b6f0d44d9bb72498f36968f933/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/clipped-scrollers-skipped.html
[modify] https://crrev.com/33152a01a9e501b6f0d44d9bb72498f36968f933/third_party/WebKit/Source/core/layout/ScrollAnchorTest.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fcbddb1c21c2932748797c0cc2e2c62d162da9f2

commit fcbddb1c21c2932748797c0cc2e2c62d162da9f2
Author: Steve Kobes <skobes@chromium.org>
Date: Mon Jun 05 22:01:03 2017

Finish converting scroll anchoring tests to web-platform-tests.

The mapping from gTest to WPT filenames is shown at:
  http://bit.ly/scroll-anchoring-wpt-conversions

Many tests have been updated or substantially rewritten to expand coverage and
to express their intent in terms of platform behavior.  In some cases, two or
more test cases were combined into one.

Most of the converted tests have been deleted from ScrollAnchorTest.  A few
tests remain in ScrollAnchorTest alongside or without conversion, because they
verify implementation-specific aspects of scroll anchoring, such as metrics,
anchor node caching, PaintLayer interactions, or flexbox delayed-clamping logic.

Bug:  725278 
Change-Id: I518baba66b4a20c6117e5bcaf7f8db2f2f4f26b8
Reviewed-on: https://chromium-review.googlesource.com/517774
Commit-Queue: Steve Kobes <skobes@chromium.org>
Reviewed-by: Stefan Zager <szager@chromium.org>
Cr-Commit-Position: refs/heads/master@{#477092}
[modify] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/TestExpectations
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/abspos-containing-block-outside-scroller.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/abspos-contributes-to-static-parent-bounds.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/ancestor-change-heuristic.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/anchor-updates-after-explicit-scroll.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/anchoring-with-bounds-clamping-div.html
[modify] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/anchoring-with-bounds-clamping.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/anonymous-block-box.html
[modify] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/basic.html
[modify] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/clipped-scrollers-skipped.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/descend-into-container-with-float.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/descend-into-container-with-overflow.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/exclude-fixed-position.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/inline-block.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/negative-layout-overflow.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/opt-out.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/position-change-heuristic.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/start-edge-in-block-layout-direction.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/subtree-exclusion.html
[add] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/LayoutTests/external/wpt/scroll-anchoring/wrapped-text.html
[modify] https://crrev.com/fcbddb1c21c2932748797c0cc2e2c62d162da9f2/third_party/WebKit/Source/core/layout/ScrollAnchorTest.cpp