Added quota client for serviceworker. Enables 'clear past <time> data'.

content/browser/service_worker/service_worker_storage.cc

Index: content/browser/service_worker/service_worker_storage.cc
diff --git a/content/browser/service_worker/service_worker_storage.cc b/content/browser/service_worker/service_worker_storage.cc
index 54eacd657f51bf4593d953a1f8bdf61a97cf6656..68aa0cd219ebc51528a48907c85500ce5866ce53 100644
--- a/content/browser/service_worker/service_worker_storage.cc
+++ b/content/browser/service_worker/service_worker_storage.cc
@@ -457,6 +457,12 @@ void ServiceWorkerStorage::StoreRegistration(
                             callback)));
 
   registration->set_is_deleted(false);
+
+  quota_manager_proxy_->NotifyStorageModified(

[michaeln, 2014/10/08 23:09:16]

We'll also have to call NotifyStorageModified for deletions and do *something*
in the DeleteAndStartOver case to start afresh. FindRegistrationForXXX calls
that find something might be a good place to call   NotifyStorageAccessed.

[dmurph, 2014/10/11 00:02:26]

We don't care about deletions for cache clearing, right?

There are a variety of other quota manager methods that can be called as well,
including:
NotifyOriginInUse
NotifyOriginNoLongerInUse
NotifyStorageAccessed

I'm thinking it might be better to grab these in a following patch.  What do you
think?

[michaeln, 2014/10/14 00:50:31]

I believe we do.
sgtm

+      storage::QuotaClient::kServiceWorker,
+      registration->pattern().GetOrigin(),
+      storage::StorageType::kStorageTypePersistent,

[jsbell, 2014/10/08 19:26:41]

Persistent->Temporary (again, sorry, my bad)

[dmurph, 2014/10/11 00:02:26]

Done.

+      0);
 }
 
 void ServiceWorkerStorage::UpdateToActiveState(