Disable *.Fullscreen tests on Windows.

Due to auto rollout of Blink past revision r166755, Win7 Tests bots break
in the browser tests --gtest_filter=*.Fullscreen

TBR=dmichael
BUG=342269

Review URL: https://codereview.chromium.org/147323005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250044 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250044