https://bugs.webkit.org/show_bug.cgi?id=120129

Rolling out http://trac.webkit.org/changeset/154399.

* rendering/RenderBlock.cpp:
* rendering/RenderBlock.h:
* rendering/RenderBlockLineLayout.cpp:
(WebCore::RenderBlock::LineBreaker::skipLeadingWhitespace):
* rendering/RenderBox.h:

* fast/block/margin-collapse/self-collapsing-block-with-float-descendant-expected.html: Removed.
* fast/block/margin-collapse/self-collapsing-block-with-float-descendant.html: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154404 268f45cc-cd09-0410-ab3c-d52691b4dbfc