QUIC - Added Net.QuicClientHelloServerConfig.InvalidDuration histogram

QUIC - Added Net.QuicClientHelloServerConfig.InvalidDuration histogram
to track server config expiration from 1 minute to 30 days.

Minor cleanup of names and description of server config expiry
and use of inchoate ClientHello.

Fixed wtc's comments for CL:
  https://codereview.chromium.org/413363005/

R=jar@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287895

[wtc, 2014-08-05 23:15:40]

Patch set 1 LGTM.

[jar (doing other things), 2014-08-05 23:21:32]

lgtm

[commit-bot: I haz the power, 2014-08-05 23:22:25]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rtenneti@chromium.org/443763002/1

[commit-bot: I haz the power, 2014-08-06 04:07:33]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)
  linux_chromium_chromeos_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  mac_chromium_rel on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel/...)
  win_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel/...)
  win_chromium_x64_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[commit-bot: I haz the power, 2014-08-06 04:44:54]

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

[commit-bot: I haz the power, 2014-08-06 04:44:55]

Try jobs failed on following builders:
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[ramant (doing other things), 2014-08-06 19:12:11]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2014-08-06 19:14:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rtenneti@chromium.org/443763002/20001

[commit-bot: I haz the power, 2014-08-06 23:32:14]

Change committed as 287895