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The following items are included in this CL.

1- Javascipt column for child processes that don't use V8 memory should always show "N/A".
2- Idle wakeups should show up only once per process.
3- NaCl debug ports column shows "Disabled" when the enable-nacl-debug flag is disabled.
4- NaCl modules should show the name of the app/extension instead of the URL.
5- Network usage can now be reported per process.

R=nick@chromium.org
BUG=551580

Review URL: https://codereview.chromium.org/1439213004

Cr-Commit-Position: refs/heads/master@{#361152}