https://bugs.webkit.org/show_bug.cgi?id=124122

Source/WebCore: 

Reviewed by Andreas Kling.
        
Support all values of the white-space property and the tab-size property.

Tests: fast/forms/basic-textareas-simple-lines.html
       fast/text/embed-at-end-of-pre-wrap-line-simple-lines.html
       fast/text/whitespace/pre-wrap-line-test-simple-lines.html
       fast/text/whitespace/pre-wrap-long-word-simple-lines.html
       fast/text/whitespace/pre-wrap-spaces-after-newline-simple-lines.html

* rendering/SimpleLineLayout.cpp:
(WebCore::SimpleLineLayout::canUseFor):
(WebCore::SimpleLineLayout::isWhitespace):
(WebCore::SimpleLineLayout::skipWhitespaces):
(WebCore::SimpleLineLayout::textWidth):
(WebCore::SimpleLineLayout::measureWord):
(WebCore::SimpleLineLayout::createTextRuns):
* rendering/SimpleLineLayoutFunctions.cpp:
(WebCore::SimpleLineLayout::paintDebugBorders):
(WebCore::SimpleLineLayout::paintFlow):

LayoutTests: 

Reviewed by Andreas Kling.
        
The simple line layout produces slightly different runs in some pre-wrap cases compared
to the line box path (with less unnecessary boxes). To keep the test coverage this patch forces the
existing render tree dump based tests to use line boxes. It also adds new ref tests for
the same cases where the test uses the simple line path and the ref is forced on the line box path.
This ensures that the paths produce pixel-identical results.

* fast/forms/basic-textareas-simple-lines-expected.html: Added.
* fast/forms/basic-textareas-simple-lines.html: Added.
* fast/forms/basic-textareas.html:
* fast/text/embed-at-end-of-pre-wrap-line-simple-lines-expected.html: Added.
* fast/text/embed-at-end-of-pre-wrap-line-simple-lines.html: Added.
* fast/text/embed-at-end-of-pre-wrap-line.html:
* fast/text/whitespace/pre-wrap-line-test-simple-lines-expected.html: Added.
* fast/text/whitespace/pre-wrap-line-test-simple-lines.html: Added.
* fast/text/whitespace/pre-wrap-line-test.html:
* fast/text/whitespace/pre-wrap-long-word-simple-lines-expected.html: Added.
* fast/text/whitespace/pre-wrap-long-word-simple-lines.html: Added. New simple test for overflowing lines which was only covered by the very large basic-textareas.html.
* fast/text/whitespace/pre-wrap-spaces-after-newline-simple-lines-expected.html: Added.
* fast/text/whitespace/pre-wrap-spaces-after-newline-simple-lines.html: Added.
* fast/text/whitespace/pre-wrap-spaces-after-newline.html:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159030 268f45cc-cd09-0410-ab3c-d52691b4dbfc