fast/css/lang-mapped-to-webkit-locale-dynamic.xhtml is flakey

* platform/mac/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146166 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[chromium] Small pixel differences in scroll bars after r145844
https://bugs.webkit.org/show_bug.cgi?id=112384

Patch by Robert Flack <flackr@chromium.org> on 2013-03-18
Reviewed by Kenneth Russell.

Source/WebCore:

Tests: fast/forms/basic-textareas-quirks.html
       fast/forms/basic-textareas.html
       fast/overflow/overflow-x-y.html
       fast/parser/open-comment-in-textarea.html
       fast/replaced/width100percent-textarea.html

* platform/chromium/ScrollbarThemeChromium.cpp:
(WebCore::ScrollbarThemeChromium::trackRect):

LayoutTests:

* platform/chromium-linux/fast/forms/basic-textareas-expected.png:
* platform/chromium-linux/fast/forms/basic-textareas-quirks-expected.png:
* platform/chromium-linux/fast/overflow/overflow-x-y-expected.png:
* platform/chromium-linux/fast/parser/open-comment-in-textarea-expected.png:
* platform/chromium-linux/fast/replaced/width100percent-textarea-expected.png:
* platform/chromium-win/fast/forms/basic-textareas-quirks-expected.png:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146167 268f45cc-cd09-0410-ab3c-d52691b4dbfc