replace COMPILE_ASSERT with static_assert in appcache_frontend_impl.cc

replace COMPILE_ASSERT with static_assert in appcache_frontend_impl.cc

BUG=442514
Committed: https://crrev.com/3cb31c320b8970c192c2baf32c35a73932911adb
Cr-Commit-Position: refs/heads/master@{#311439}

[Mostyn Bramley-Moore, 2015-01-13 08:59:16]

mostynb@opera.com changed reviewers:
+ michaeln@chromium.org

[Mostyn Bramley-Moore, 2015-01-13 08:59:17]

@michaeln: please take a look.

[michaeln, 2015-01-13 21:50:33]

lgtm

[Mostyn Bramley-Moore, 2015-01-14 08:55:20]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2015-01-14 08:55:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/847083002/1

[commit-bot: I haz the power, 2015-01-14 09:00:00]

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

[commit-bot: I haz the power, 2015-01-14 09:00:02]

Try jobs failed on following builders:
  ios_dbg_simulator on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)

[Mostyn Bramley-Moore, 2015-01-14 09:02:37]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2015-01-14 09:03:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/847083002/1

[commit-bot: I haz the power, 2015-01-14 09:54:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-14 09:55:58]

Patchset 1 (id:??) landed as
https://crrev.com/3cb31c320b8970c192c2baf32c35a73932911adb
Cr-Commit-Position: refs/heads/master@{#311439}