minyue e37a2d1802 Reland "Removing webrtc::AudioFrame::energy_."
Some WebRTC client had a problem with the change "Removing webrtc::AudioFrame::energy_". Now it is solved.

This reverts commit 2bdcfadc8abd418a30dd5cdf54ba45a429d3d9bf.

BUG=webrtc:3315

Review URL: https://codereview.webrtc.org/1638553003

Cr-Commit-Position: refs/heads/master@{#11448}
2016-02-01 18:02:45 +00:00
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