This associates the two types instead of incorrectly reinterpret casting VoiceEngineImpl* to VoiceEngine* (since these types were previously unrelated). Please see more details in the bug for how this is currently causing problems with security tools. BUG=38612 Review URL: https://webrtc-codereview.appspot.com/1099013 git-svn-id: http://webrtc.googlecode.com/svn/trunk@3520 4adac7df-926f-26a2-2b94-8c16560cd09d