Add a float interface to PushSincResampler.

Provides a push interface to SincResampler without the int16->float
overhead. This is required to support resampling in the new
AudioProcessing float path.

BUG=2894
TESTED=unit tests
R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/9529004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5673 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed