https://bugs.webkit.org/show_bug.cgi?id=119517

Reviewed by David Hyatt.

Source/WebCore:

Test: fast/regions/abspos-autoheight-nested-region.html

In the case of an (inner) auto-height region that is absolutely positioned in a named flow that is displayed in an (outer) auto-height region,
when we are doing the layout for the named flow we need to add a "forced region break" also for the case of simplified layout, otherwise
the outer auto-height region will not get the chance to compute its auto-height, ending up with a huge value that was used to initialize
the auto-height computed value before the start of the layout algorithm.

* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::simplifiedLayout):

LayoutTests:

* fast/regions/abspos-autoheight-nested-region-expected.txt: Added.
* fast/regions/abspos-autoheight-nested-region.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153781 268f45cc-cd09-0410-ab3c-d52691b4dbfc