Changed FakeVoiceEngine into a MockVoiceEngine.

Changed FakeVoiceEngine into a MockVoiceEngine.

BUG=webrtc:4690
R=tommi@webrtc.org

Committed: https://crrev.com/0ccae135562ac180da053fcecda91a0365621f14
Cr-Commit-Position: refs/heads/master@{#10491}

[the sun, 2015-11-02 15:27:20]

solenberg@webrtc.org changed reviewers:
+ tommi@webrtc.org

[tommi, 2015-11-02 15:37:50]

lgtm

[the sun, 2015-11-02 16:39:09]

The CQ bit was checked by solenberg@webrtc.org

[the sun, 2015-11-02 16:39:09]

The patchset sent to the CQ was uploaded after l-g-t-m from tommi@webrtc.org
Link to the patchset: https://codereview.webrtc.org/1402403008/#ps20001 (title:
"rebase")

[commit-bot: I haz the power, 2015-11-02 16:39:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1402403008/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1402403008/20001

[commit-bot: I haz the power, 2015-11-02 16:43:51]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-11-02 16:43:52]

Try jobs failed on following builders:
  presubmit on tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/presubmit/builds/1521)

[the sun, 2015-11-03 09:16:05]

Committed patchset #4 (id:60001) manually as
0ccae135562ac180da053fcecda91a0365621f14 (presubmit successful).

[commit-bot: I haz the power, 2015-11-03 09:16:10]

Patchset 4 (id:??) landed as
https://crrev.com/0ccae135562ac180da053fcecda91a0365621f14
Cr-Commit-Position: refs/heads/master@{#10491}