Preserve the D3D11 offscreen texture contents when the swap chain is reset (ie from window resize).

TRAC #21929

Signed-off-by: Nicolas Capens
Signed-off-by: Shannon Woods
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1860 736b8ea6-26fd-11df-bfd4-992fa37f6226
2 files changed