TRAC #12547

ValidateDevice checks for correct rendering state as well, which we don't need.

Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch

Author:    Andrew Lewycky

git-svn-id: https://angleproject.googlecode.com/svn/trunk@354 736b8ea6-26fd-11df-bfd4-992fa37f6226