Simplification of histogram normalization in delay estimator.

- Replaces a for loop with a single element update to save complexity. No regression in performance seen on set of recordings.
- Removes UpdatesMadeUponChange() and put code straight into ProcessBinarySpectrum().

BUG=None
TESTED=module_unittest, trybots, verified manually on set of recordings.
R=aluebs@webrtc.org, andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/5929004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5298 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed