Fix ResourceLoadTiming Resolution Issue 3rd step - remove old fields

Fix ResourceLoadTiming Resolution Issue 3rd step - remove old fields

This is 3rd step to Fix ResourceLoadTiming resolution issue, remove old fileds
and macros from blink, the new will be used as default.

Contributed by pan.deng@intel.com

BUG=242452
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=151363

[Pan, 2013-05-23 11:29:57]

This change must be landed after CL https://codereview.chromium.org/15552003/
while, it is ready to review :)

thanks!
Pan

[abarth-chromium, 2013-05-23 17:23:11]

LGTM

[commit-bot: I haz the power, 2013-05-29 04:44:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/pan.deng@intel.com/15863002/1

[commit-bot: I haz the power, 2013-05-29 07:58:05]

Change committed as 151363