https://bugs.webkit.org/show_bug.cgi?id=99584

Reviewed by David Hyatt.

Source/WebCore:

Add support for the text-align-last CSS3 property, according to the latest specification:
http://dev.w3.org/csswg/css-text-3/#text-align-last-property

Tests: fast/css3-text/css3-text-align-last/text-align-last-with-text-align-justify.html
       fast/css3-text/css3-text-align-last/text-align-last-with-text-align-non-justify.html

* rendering/RenderBlockLineLayout.cpp:
(WebCore::RenderBlockFlow::textAlignmentForLine):
* rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::changeRequiresLayout):

LayoutTests:

* fast/css3-text/css3-text-align-last/text-align-last-with-text-align-justify-expected.html: Added.
* fast/css3-text/css3-text-align-last/text-align-last-with-text-align-justify.html: Added.
* fast/css3-text/css3-text-align-last/text-align-last-with-text-align-non-justify-expected.html: Added.
* fast/css3-text/css3-text-align-last/text-align-last-with-text-align-non-justify.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162213 268f45cc-cd09-0410-ab3c-d52691b4dbfc