[ServiceWorkerCache] Call QuotaManager::NotifyStorageModified from Cache.

[ServiceWorkerCache] Call QuotaManager::NotifyStorageModified from Cache.

With this call the quota manager can delete origins modified in the last X hours.

Changes:
* Plumb origin and QuotaManagerProxy through to ServiceWorkerCache.

* Call NotifyStorageModified on SWCache::Put() and SWCache::Delete() with the delta being the number of content bytes written (not including caching structure overhead).

* Update the tests to use a MockQuotaManagerProxy instead of passing a nullptr.

Upstream of: https://codereview.chromium.org/672943002

BUG=420159
Committed: https://crrev.com/6cb43f40df3f3cf12bcecb20d713d6f5a5c894d6
Cr-Commit-Position: refs/heads/master@{#301086}

[jkarlin, 2014-10-23 15:22:03]

jkarlin@chromium.org changed reviewers:
+ falken@chromium.org, michaeln@chromium.org

[jkarlin, 2014-10-23 15:22:04]

michaeln@chromium.org: Please review changes in all

falken@chromium.org: Please review changes in all

Thanks!

[falken, 2014-10-24 02:04:45]

lgtm

[jkarlin, 2014-10-24 12:12:55]

The CQ bit was checked by jkarlin@chromium.org

[commit-bot: I haz the power, 2014-10-24 12:13:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/674873002/80001

[commit-bot: I haz the power, 2014-10-24 12:57:56]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2014-10-24 12:58:45]

Patchset 5 (id:??) landed as
https://crrev.com/6cb43f40df3f3cf12bcecb20d713d6f5a5c894d6
Cr-Commit-Position: refs/heads/master@{#301086}