Moved common members in TextureStorage11_2D and TextureStorage11_Cube into TextureStorage11. TRAC #22422 Signed-off-by: Jamie Madill Signed-off-by: Nicolas Capens Author: Geoff Lang git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1914 736b8ea6-26fd-11df-bfd4-992fa37f6226