[Win] Unreviewed Windows gardening.

[Win] Unreviewed Windows gardening.

Rebaseline a few tests based on current bot output.

* platform/win/fast/regions/multiple-directionality-changes-in-variable-width-regions-expected.txt:
* platform/win/fast/regions/region-dynamic-after-before-expected.txt:
* platform/win/fast/regions/region-generated-content-before-after-expected.txt:
* platform/win/fast/regions/text-region-split-small-pagination-expected.txt:
* platform/win/fast/text/international/thai-baht-space-expected.txt:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@178678 268f45cc-cd09-0410-ab3c-d52691b4dbfc