cc: Initialize wait_for_beginframe_interval in tests.

cc: Initialize wait_for_beginframe_interval in tests.

Only setting disable_display_vsync isn't sufficient and
results in timeouts on Android perf bots.

BUG=510430
TBR=danakj

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/9bf7d5657eab1f1f57e9527fd2af9a8786e5d979
Cr-Commit-Position: refs/heads/master@{#338894}

[brianderson, 2015-07-15 17:24:20]

brianderson@chromium.org changed reviewers:
+ danakj@chromium.org, jincheol.jo@navercorp.com

[brianderson, 2015-07-15 17:24:21]

ptal.

This potentially fixes perf bot timeouts.

[brianderson, 2015-07-15 17:49:45]

The CQ bit was checked by brianderson@chromium.org

[commit-bot: I haz the power, 2015-07-15 17:51:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1234463004/1

[danakj, 2015-07-15 17:53:27]

LGTM

[commit-bot: I haz the power, 2015-07-15 19:53:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-15 19:53:50]

Patchset 1 (id:??) landed as
https://crrev.com/9bf7d5657eab1f1f57e9527fd2af9a8786e5d979
Cr-Commit-Position: refs/heads/master@{#338894}