Revert of Remove burst mode from VSyncMonitor.

Revert of Remove burst mode from VSyncMonitor. (https://codereview.chromium.org/346813002/)

Reason for revert:
Four of the introduced tests time out on Android.

VSyncMonitorTest#testVSyncActivationFromIdleAllowJBVSync
VSyncMonitorTest#testVSyncActivationFromIdleDisallowJBVSync
VSyncMonitorTest#testVSyncPeriodAllowJBVSync
VSyncMonitorTest#testVSyncPeriodDisallowJBVSync

The log output can be seen here:

http://build.chromium.org/p/chromium.linux/builders/Android%20Tests%20%28dbg%29/builds/21188/steps/contentshell_instrumentation_tests/logs/stdio

This failure could be observed in the try-bot results as part of the patch. Please do not use NOTRY unless you're absolutely certain that the failures are unrelated.

Original issue's description:
> Remove burst mode from VSyncMonitor.
> 
> Extra vsyncs after each rendering cause 1% more power consumption.
> 
> NOTRY=true
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=279997

TBR=tedchoc@chromium.org,sievers@chromium.org,aruslan@chromium.org,brianderson@chromium.org,skyostil@google.com,skyostil@chromium.org,bulach@chromium.org,miguelg@chromium.org,yfriedman@chromium.org,newt@chromium.org,egor.starkov@samsung.com
NOTREECHECKS=true
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=280012

[Peter Beverloo, 2014-06-26 15:22:08]

Created Revert of Remove burst mode from VSyncMonitor.

[commit-bot: I haz the power, 2014-06-26 15:22:54]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peter@chromium.org/358473006/1

[commit-bot: I haz the power, 2014-06-26 15:24:26]

Change committed as 280012