Averaging nested result lists instead of flattening them.

Averaging nested result lists instead of flattening them.

Also, removing special case where certain metrics where summed instead of averaged since they are now handled in the dashboard by averaging, no longer making them special cases.

BUG=447588
Committed: https://crrev.com/658fcf7f1e37ac413ffbfa91c6e9c6e7acf10200
Cr-Commit-Position: refs/heads/master@{#311377}

[RobertoCN, 2015-01-13 23:35:58]

robertocn@chromium.org changed reviewers:
+ prasadv@chromium.org, qyearsley@chromium.org

[RobertoCN, 2015-01-13 23:35:58]

How does this look?

[qyearsley, 2015-01-13 23:57:03]

On 2015/01/13 23:35:58, robertocn wrote:
> How does this look?

LGTM -- I would add a note in the CL description saying that it's also removing
the special case for page_cycler etc. where it was summing values, because now
on the dashboard these values are also averaged, there is no longer a special
case.

[prasadv, 2015-01-13 23:58:20]

lgtm

[RobertoCN, 2015-01-13 23:59:58]

The CQ bit was checked by robertocn@chromium.org

[commit-bot: I haz the power, 2015-01-14 00:00:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/847273002/1

[commit-bot: I haz the power, 2015-01-14 00:50:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-14 00:51:45]

Patchset 1 (id:??) landed as
https://crrev.com/658fcf7f1e37ac413ffbfa91c6e9c6e7acf10200
Cr-Commit-Position: refs/heads/master@{#311377}