Fix WebCore.Scripts.ParsingBlocking.TimeBetweenLoadedAndCompiled UMA some more.

Fix WebCore.Scripts.ParsingBlocking.TimeBetweenLoadedAndCompiled UMA some more.

Resources which were already loaded and then revalidated were skewing the data:
load time was coming from the already loaded resource, compile time was the new
compilation time.

R=jochen@chromium.org
BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181895

[jochen (gone - plz use gerrit), 2014-09-12 11:28:09]

lgtm

[marja, 2014-09-12 11:35:28]

The CQ bit was checked by marja@chromium.org

[commit-bot: I haz the power, 2014-09-12 11:36:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/562653005/1

[commit-bot: I haz the power, 2014-09-12 11:46:36]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-12 11:46:37]

Try jobs failed on following builders:
  linux_chromium_gn_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_chromium_gn_rel/bu...)

[marja, 2014-09-12 11:55:59]

The CQ bit was checked by marja@chromium.org

[commit-bot: I haz the power, 2014-09-12 11:56:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/562653005/1

[commit-bot: I haz the power, 2014-09-12 12:37:25]

Committed patchset #1 (id:1) as 181895