CacheStorage: Remove unused interfaces from CacheStorageListener

CacheStorage: Remove unused interfaces from CacheStorageListener

BUG=n/a
TEST=compile

Committed: https://crrev.com/54d0ba2e50eb5a92899253cca258b626cd865605
Cr-Commit-Position: refs/heads/master@{#326997}

[nhiroki, 2015-04-27 03:18:40]

The CQ bit was checked by nhiroki@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-04-27 03:18:42]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1088903011/1

[nhiroki, 2015-04-27 03:19:21]

nhiroki@chromium.org changed reviewers:
+ falken@chromium.org

[nhiroki, 2015-04-27 03:19:30]

PTAL

[falken, 2015-04-27 03:24:53]

lgtm

[commit-bot: I haz the power, 2015-04-27 03:25:11]

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

[commit-bot: I haz the power, 2015-04-27 03:25:12]

Dry run: Try jobs failed on following builders:
  linux_chromium_gn_chromeos_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[nhiroki, 2015-04-27 03:25:59]

The CQ bit was checked by nhiroki@chromium.org

[commit-bot: I haz the power, 2015-04-27 03:26:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1088903011/1

[commit-bot: I haz the power, 2015-04-27 04:32:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-27 04:33:22]

Patchset 1 (id:??) landed as
https://crrev.com/54d0ba2e50eb5a92899253cca258b626cd865605
Cr-Commit-Position: refs/heads/master@{#326997}