Windows: build fix
Windows: build fix

Windows doesn't have a DescriptorSet, so don't try to copy it.


git-svn-id: http://src.chromium.org/svn/trunk/src@9473 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 1389528ca3ec664ae88c7dcb458016a1f81a1452
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser