Fix traverseNonCompositingDescendantsInPaintOrder for float-under-inline cases
We should traverse into composited inlines even if they are stacking
context, because there might be floating objects which belong to
ancestors in paint order.
During traverse for paint invalidation, when we encounter a floating
object, we should mark the real painting layer for paint invalidation
which may be above the tip of the subtree being traversed.
BUG=644144
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Review-Url: https://codereview.chromium.org/2639283003
Cr-Commit-Position: refs/heads/master@{#445679}
2 files changed
