ASSERT_NOT_REACHED() is touched in WebCore::minimumValueForLength

ASSERT_NOT_REACHED() is touched in WebCore::minimumValueForLength
https://bugs.webkit.org/show_bug.cgi?id=125781
<rdar://problem/27684457>

Reviewed by Simon Fraser.

Source/WebCore:

RenderTableSection::calcRowLogicalHeight misused minimumValueForLength to fallback to 0 for non-fixed values.
While this patch fixes the assertion, the table section code needs works to support calc values. See webkit.org/b/161273.

Test: fast/table/assert-on-min-max-content-values.html

* rendering/RenderTableSection.cpp:
(WebCore::RenderTableSection::calcRowLogicalHeight):

LayoutTests:

* fast/table/assert-on-min-max-content-values-expected.txt: Added.
* fast/table/assert-on-min-max-content-values.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@205056 268f45cc-cd09-0410-ab3c-d52691b4dbfc