Update return value of getComputedStyle for sticky elements
Top/bottom/left/right have special meaning for sticky elements. So when
calling getComputedStyle on sticky elements whose style contains
"top: auto;", we should return "auto" rather than "0px" to eliminate
ambiguity.
Chromium followed the spec which specifies that getComputedStyle should
return used value (0px) for sticky elements with "top: auto;". That is
incorrect. A spec issue has been added:
https://github.com/w3c/csswg-drafts/issues/1346
BUG=703816
TEST=LayoutTests/fast/css/sticky/sticky-top-auto-get-computedstyle.html
Review-Url: https://codereview.chromium.org/2870983002
Cr-Commit-Position: refs/heads/master@{#471185}
2 files changed
