Progress control gets cropped on the bottom

Progress control gets cropped on the bottom
https://bugs.webkit.org/show_bug.cgi?id=68302
<rdar://problem/10069915>

Reviewed by Kent Tamura.

As it turns out the smaller control type does not get rendered either, so this patch
fixes both.

* manual-tests/dom/progressbar.html: Altered to show both sizes of controls
* rendering/RenderThemeMac.h:
* rendering/RenderThemeMac.mm: Added methods to inflate the drawing rect
(WebCore::RenderThemeMac::progressBarSizes):
(WebCore::RenderThemeMac::progressBarMargins):
(WebCore::RenderThemeMac::minimumProgressBarHeight):
(WebCore::RenderThemeMac::paintProgressBar): Inflate the rect based on minimum desired
control height and glow margin.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95757 268f45cc-cd09-0410-ab3c-d52691b4dbfc