Chrome uses this to for composited rendering. Currently Chrome uses a BGRA texture format
for surface sharing, so we must create our offscreen textures this way.
See EGL_ANGLE_query_surface_pointer, EGL_ANGLE_surface_d3d_texture_2d_share_handle,
EGL_ANGLE_d3d_share_handle_client_buffer.

TRAC #22410

Signed-off-by: Geoff Lang
Signed-off-by: Daniel Koch
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1772 736b8ea6-26fd-11df-bfd4-992fa37f6226