Revert of Add some performance testing for paint invalidations

Revert of Add some performance testing for paint invalidations (https://codereview.chromium.org/450813002/)

Reason for revert:
Timing out on perf bots. One example:
http://chromegw/i/chromium.perf/builders/Linux%20Perf%20%281%29/builds/2268/steps/blink_perf/logs/stdio

Original issue's description:
> Add some performance testing for paint invalidations
> 
> After moving paint invalidations after compositing updates, we
> lost most of the performance coverage we had as most performance
> tests trigger layout without generating a frame.
> 
> The new cases are DRT specific as we use
> Internals.forceCompositingUpdate. This is required as rAF
> will cap the tests to the sync frequency.
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=179881

TBR=dsinclair@chromium.org,esprehn@chromium.org,leviw@chromium.org,xianxianzhu@chromium.org,jchaffraix@chromium.org
NOTREECHECKS=true
NOTRY=true

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=179886

[tonyg, 2014-08-09 17:28:50]

Created Revert of Add some performance testing for paint invalidations

[commit-bot: I haz the power, 2014-08-09 17:29:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tonyg@chromium.org/459663002/1

[commit-bot: I haz the power, 2014-08-09 17:29:44]

Change committed as 179886