Simplify CrasAudioHandler code.

Simplify CrasAudioHandler code.

- Add helper functions like GetCrasAudioClient().
- Remove else after returns.
- Fix misc style nits.

Review-Url: https://codereview.chromium.org/2831443002
Cr-Commit-Position: refs/heads/master@{#465442}
Committed: https://chromium.googlesource.com/chromium/src/+/ab84818703b820d9596a9637a91f73e64096f5b8

[Lei Zhang, 2017-04-18 23:11:02]

thestig@chromium.org changed reviewers:
+ jennyz@chromium.org

[jennyz, 2017-04-18 23:43:26]

lgtm

[Lei Zhang, 2017-04-18 23:48:16]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2017-04-18 23:48:51]

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, 2017-04-19 00:39:47]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492559296602580, "parent_rev":
"530d8d8f6099b84153281300f1bd9b82384ab459", "commit_rev":
"ab84818703b820d9596a9637a91f73e64096f5b8"}

[commit-bot: I haz the power, 2017-04-19 00:39:55]

Description was changed from

==========
Simplify CrasAudioHandler code.

- Add helper functions like GetCrasAudioClient().
- Remove else after returns.
- Fix misc style nits.
==========

to

==========
Simplify CrasAudioHandler code.

- Add helper functions like GetCrasAudioClient().
- Remove else after returns.
- Fix misc style nits.

Review-Url: https://codereview.chromium.org/2831443002
Cr-Commit-Position: refs/heads/master@{#465442}
Committed:
https://chromium.googlesource.com/chromium/src/+/ab84818703b820d9596a9637a91f...
==========

[commit-bot: I haz the power, 2017-04-19 00:39:56]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/ab84818703b820d9596a9637a91f...