BUG=none
TEST=media_unittest.exe --gunit_catch_exceptions=0 --yuvconverter_repeat=1000 --gunit_filter=LmiVideoFrameTest.ConvertTo*R*
Review URL: https://webrtc-codereview.appspot.com/355002

git-svn-id: http://libyuv.googlecode.com/svn/trunk@138 16f28f9a-4ce2-e073-06de-1de4eb20be90