Adding stride alignment

TEST= common_video_unittests and video_capture_module_test

BUG=985

Review URL: https://webrtc-codereview.appspot.com/965005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3023 4adac7df-926f-26a2-2b94-8c16560cd09d
5 files changed