Update default parameters in screenshare_loopback test

Update default parameters in screenshare_loopback test

They should match the parameters used in the FullStack quality tests, so
that it is easier to visualize what we are actually testing.

BUG=

Committed: https://crrev.com/7169bdae3bc86c70808488b34fc5548c5e821085
Cr-Commit-Position: refs/heads/master@{#12466}

[sprang_webrtc, 2016-04-07 13:17:00]

sprang@webrtc.org changed reviewers:
+ pbos@webrtc.org

[pbos-webrtc, 2016-04-11 14:09:18]

rs-lgtm

[sprang_webrtc, 2016-04-22 08:58:43]

The CQ bit was checked by sprang@webrtc.org

[commit-bot: I haz the power, 2016-04-22 08:58:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1871543002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1871543002/1

[commit-bot: I haz the power, 2016-04-22 10:49:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-22 10:49:12]

Description was changed from

==========
Update default parameters in screenshare_loopback test

They should match the parameters used in the FullStack quality tests, so
that it is easier to visualize what we are actually testing.

BUG=
==========

to

==========
Update default parameters in screenshare_loopback test

They should match the parameters used in the FullStack quality tests, so
that it is easier to visualize what we are actually testing.

BUG=

Committed: https://crrev.com/7169bdae3bc86c70808488b34fc5548c5e821085
Cr-Commit-Position: refs/heads/master@{#12466}
==========

[commit-bot: I haz the power, 2016-04-22 10:49:13]

Patchset 1 (id:??) landed as
https://crrev.com/7169bdae3bc86c70808488b34fc5548c5e821085
Cr-Commit-Position: refs/heads/master@{#12466}