Get rid of a lot of special code for RenderFlowThread invalidation.
Don't force a RenderFlowThread to become a paint invalidation container.
In fact, that should never happen.
What's still missing is to handle cases where an invalidation container
is inside the multicol container. That has never worked.
The NULL-check in LinkHighlight::attachLinkHighlightToCompositingLayer()
is no longer needed with this CL.
BUG=359877
R=chrishtr@chromium.org,jchaffraix@chromium.org
Review URL: https://codereview.chromium.org/757933003
git-svn-id: svn://svn.chromium.org/blink/trunk@186091 bbb929c8-8fbe-4397-9dbb-9b2b20218538
23 files changed
