Use std::tie() for operator< in storage/

Use std::tie() for operator< in storage/

Simplify the code for operator< when comparing multiple members using
a common std::tie idiom.

BUG=555171
R=danakj@chromium.org

Committed: https://crrev.com/88d282b32742c2208b5e470a8f7f88526a6badc7
Cr-Commit-Position: refs/heads/master@{#360873}

[jsbell, 2015-11-19 22:25:40]

danakj@ - please take a look?

[danakj, 2015-11-19 23:06:27]

LGTM

[jsbell, 2015-11-19 23:06:50]

The CQ bit was checked by jsbell@chromium.org

[commit-bot: I haz the power, 2015-11-19 23:08:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1455403004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1455403004/1

[commit-bot: I haz the power, 2015-11-20 00:30:02]

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

[commit-bot: I haz the power, 2015-11-20 00:30:03]

Try jobs failed on following builders:
  ios_dbg_simulator_ninja on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  ios_rel_device_ninja on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)

[jsbell, 2015-11-20 19:01:37]

The CQ bit was checked by jsbell@chromium.org

[commit-bot: I haz the power, 2015-11-20 19:05:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1455403004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1455403004/1

[commit-bot: I haz the power, 2015-11-20 19:14:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-20 19:15:50]

Patchset 1 (id:??) landed as
https://crrev.com/88d282b32742c2208b5e470a8f7f88526a6badc7
Cr-Commit-Position: refs/heads/master@{#360873}