[Qt] Add support for text decoration "wavy" style
https://bugs.webkit.org/show_bug.cgi?id=93507

Patch by Lamarque V. Souza <Lamarque.Souza@basyskom.com> on 2013-01-31
Reviewed by Simon Hausmann.

Source/WebCore:

Add support for text decoration "wavy" style for Qt platform.

* platform/graphics/qt/GraphicsContextQt.cpp:
(WebCore::toQPenStyle):
Remove FIXME comments obsoleted by this patch.
(WebCore::GraphicsContext::drawLine):
Implement wavy style line tracer.

LayoutTests:

Add pixel-test expected results for CSS3 text decoration tests for Qt port.

* platform/qt-5.0-wk1/fast/css3-text/css3-text-decoration/repaint/repaint-text-decoration-style-expected.png: Added.
* platform/qt-5.0-wk1/fast/css3-text/css3-text-decoration/text-decoration-style-expected.png: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141542 268f45cc-cd09-0410-ab3c-d52691b4dbfc