Build fix: skip conformance/textures/texture-size-limit.html on win.

This only affacts GPU bots.

It's crashing the tab and cause the webgl_conformance harness to stop

BUG=322789
TEST=
TBR=bajones@chromium.org,kbr@chromium.org

Review URL: https://codereview.chromium.org/84463002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236947 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236947