minyue 6a85d3450c Fixing UpdateLevel function in AEC.
From an earlier CL, we start to feed UpdateLevel() with power instead of energy. I found that UpdateLevel() is still taking the input as energy and normalize it. This CL fixes this.

The earlier CL is
https://codereview.webrtc.org/1542573002/

BUG=

Review URL: https://codereview.webrtc.org/1810773003

Cr-Commit-Position: refs/heads/master@{#12084}
2016-03-22 09:15:01 +00:00
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