Use TestCooperativeLevel instead of ValidateDevice to check for device loss. 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