Update code for generating osc sweep reference files

Update code for generating osc sweep reference files

Update instruction and code on how to generate the reference files for
the oscillator sweep tests.

Manually extracted the code to its own file and ran the test to
generate a swept sine wave.  Output is generated and audibly sounds
correct.

BUG=689689
TEST=

Review-Url: https://codereview.chromium.org/2687953002
Cr-Commit-Position: refs/heads/master@{#449462}
Committed: https://chromium.googlesource.com/chromium/src/+/f5f830019d57e4405d74568dde8989b5cc7661c4

[Raymond Toy, 2017-02-09 18:57:14]

rtoy@chromium.org changed reviewers:
+ hongchan@chromium.org

[Raymond Toy, 2017-02-09 18:57:14]

PTAL

[hongchan, 2017-02-09 21:56:00]

lgtm

[Raymond Toy, 2017-02-09 22:13:03]

The CQ bit was checked by rtoy@chromium.org

[commit-bot: I haz the power, 2017-02-09 22:13:27]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-09 23:26:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486678383253510, "parent_rev":
"7273c6c6210628e39f02afa086ed025413cf8611", "commit_rev":
"f5f830019d57e4405d74568dde8989b5cc7661c4"}

[commit-bot: I haz the power, 2017-02-09 23:27:02]

Description was changed from

==========
Update code for generating osc sweep reference files

Update instruction and code on how to generate the reference files for
the oscillator sweep tests.

Manually extracted the code to its own file and ran the test to
generate a swept sine wave.  Output is generated and audibly sounds
correct.

BUG=689689
TEST=
==========

to

==========
Update code for generating osc sweep reference files

Update instruction and code on how to generate the reference files for
the oscillator sweep tests.

Manually extracted the code to its own file and ran the test to
generate a swept sine wave.  Output is generated and audibly sounds
correct.

BUG=689689
TEST=

Review-Url: https://codereview.chromium.org/2687953002
Cr-Commit-Position: refs/heads/master@{#449462}
Committed:
https://chromium.googlesource.com/chromium/src/+/f5f830019d57e4405d74568dde89...
==========

[commit-bot: I haz the power, 2017-02-09 23:27:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/f5f830019d57e4405d74568dde89...