Reason for revert:
Compile error on bots - A subclass of cricket::VideoFrame still uses old GetRotation return type.
BUG=4145
TBR=guoweis,stefan,pthatcher
This reverts commit 3e733a43f5a1a2c170e1064d0ee0af38d710a64a.
Review URL: https://webrtc-codereview.appspot.com/34159004
Cr-Commit-Position: refs/heads/master@{#8265}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8265 4adac7df-926f-26a2-2b94-8c16560cd09d