Exlcude two tests in VideoAdapter for WinDrMemoryFull.

http://chromegw.corp.google.com/i/client.webrtc/builders/Win%20DrMemory%20Full/builds/793

BUG=3655
R=henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/13169004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6904 4adac7df-926f-26a2-2b94-8c16560cd09d