Using "static_assert" in lieu of "COMPILE_ASSERT" in storage module

Using "static_assert" in lieu of "COMPILE_ASSERT"  in storage module

All our toolchains support c++'s static_assert now- COMPILE_ASSERT can be removed now.

BUG=442514
Committed: https://crrev.com/4bd5ab2bd10ae5c2a52fb5c4b26ffa6da417377d
Cr-Commit-Position: refs/heads/master@{#312553}

[anujsharma, 2015-01-21 12:59:24]

anujk.sharma@samsung.com changed reviewers:
+ piman@chromium.org

[anujsharma, 2015-01-21 12:59:25]

PTAL

[piman, 2015-01-21 18:04:27]

lgtm

[anujsharma, 2015-01-22 00:46:06]

On 2015/01/21 18:04:27, piman (Very slow to review) wrote:
> lgtm

Thanks piman for lgtm.

[anujsharma, 2015-01-22 00:46:52]

The CQ bit was checked by anujk.sharma@samsung.com

[commit-bot: I haz the power, 2015-01-22 00:47:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/809553005/1

[commit-bot: I haz the power, 2015-01-22 03:26:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-22 03:27:21]

Patchset 1 (id:??) landed as
https://crrev.com/4bd5ab2bd10ae5c2a52fb5c4b26ffa6da417377d
Cr-Commit-Position: refs/heads/master@{#312553}