scripts: Modify audio.js for emphasis_disabled in drc
scripts: Modify audio.js for emphasis_disabled in drc

There is a new parameter "emphasis_disabled" in drc. This patch modifies
audio.js file in audio_tuning webpage such that it will check if
emphasis/disemphasis is disabled in chrome, then determine
drc.emphasis_disabled config value.

BUG=chrome-os-partner:25940
TEST=run audio_tuning webpage with modified audio.js. Checks that the
output config contains "drc.emphasis_disabled": 0 for chrome without
https://codereview.chromium.org/152333003/, and contains
"drc.emphasis_disabled": 1 for chrome with
https://codereview.chromium.org/152333003/.

Change-Id: I6ef355a1d7cd6a4ac340f711d4270a6a88d42b27
Reviewed-on: https://chromium-review.googlesource.com/186857
Reviewed-by: Hsinyu Chao <8b91762bdbe27d3121b311091d7ca5125e9a8df6@chromium.org>
Commit-Queue: Cheng-Yi Chiang <7226c36972b1e885065c866165c0a3fa5fd602de@chromium.org>
Tested-by: Cheng-Yi Chiang <7226c36972b1e885065c866165c0a3fa5fd602de@chromium.org>

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