Revert 239784 "Make page_cycler.py fully measure memory for each..."

Revert 239784 "Make page_cycler.py fully measure memory for each..."

> Make page_cycler.py fully measure memory for each page.
> 
> Telemetry makes the distinction between metrics collected for each page and for
> each page set. The fine-grained memory metrics were collected only per page set
> (although there was some histogram data collected per page).
> 
> This CL makes the memory metric module systematically report the whole data per
> page (and not only per page set) so that we can measure pages independently.
> The per page set memory metric collection is now a no-op.
> 
> BUG=323494
> 
> Review URL: https://codereview.chromium.org/91573003

TBR=pliard@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=239791

[Philippe, 2013-12-10 16:23:18]

Committed patchset #1 manually as r239791.