Use an agnostic renderer in Buffer, rather than D3D9-specific.

TRAC #22362

Author: Shannon Woods
Signed-off-by: Geoff Lang
Signed-off-by: Daniel Koch

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1676 736b8ea6-26fd-11df-bfd4-992fa37f6226
2 files changed