Conditional discard in loop test

Test for issue with conditional discard in loop for angle directx 11 implementation.
Conformance suite test for reported issue : https://code.google.com/p/angleproject/issues/detail?id=706
Chrome stable 36.0.1985.125 m, Chrome canary 38.0.2117.2 canary and Opera 23.0.1522.72 fail this test.
All are using angle with directx 11 as backend.
Firefox (both native and angle dx9) , maxthon and IE 11 pass the test.
Also the Chrome builds with angle dx9 backend (--disable-d3d11 on commandline)  pass the test.