Revert 194260 "Revert 194220 "[Telemetry] Make page cyclers more..."

Revert 194260 "Revert 194220 "[Telemetry] Make page cyclers more..."

Re-landing. Should work now that a race has been fixed by r194470.

> Revert 194220 "[Telemetry] Make page cyclers more telemetric."
> 
> Caused page cycler to hang on bots.
> 
> > [Telemetry] Make page cyclers more telemetric.
> > 
> > This causes the page cyclers to use page_sets instead of just navigating to the
> > start page and letting the pages cycle themselves. This means we'll be using
> > Telemetry "properly" which will allow us to record new page sets to update the
> > page cyclers and it means that page cycler page sets are interchangeable with
> > other benchmarks.
> > 
> > The page cyclers still measure the same thing as they measured previously: the
> > time to load the page and perform a layout. However, they measure it differently
> > now. Instead of setting a new Date().getTime() in the cookie immediately before
> > navigating and then grabbing the finish Date in the onload handler, this now
> > just grabs performance.now() in the onload handler. This returns the number of
> > milliseconds since navigationStart where navigation start is the same as the
> > immediately before navigation time marked before. I've verified locally that the
> > times reported are consistent, and will monitor the bots to verify.
> > 
> > This involved moving the serving_dirs property up from the page to the page_set.
> > 
> > BUG=None
> > TEST=All page cyclers on linux and morejs on windows
> > NOTRY=True
> > 
> > Review URL: https://codereview.chromium.org/13817009
> 
> TBR=tonyg@chromium.org
> 
> Review URL: https://codereview.chromium.org/14048008

TBR=tonyg@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=194475

[tonyg, 2013-04-16 22:58:24]

Committed patchset #1 manually as r194475.