Fix CopyFileACL on Windows XP.

FILE_ATTRIBUTE_NOT_CONTENT_INDEXED doesn't exist on XP.

R=thakis@chromium.org
BUG=116251

Review URL: https://codereview.chromium.org/139373004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244979 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244979