Windows: Add wow_helper.exe to the 32-bit binary distribution for Vista 64-bit sandbox support (issue #1366).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk@1827 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Mac: Reduce resource usage on SetWindowVisibility(false) and fix delivery of application hide/unhide notifications (issue #1369)

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk@1830 5089003a-bbd8-11dd-ad1f-f1f9622dbc98