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

content/browser/service_worker/service_worker_version.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/service_worker/service_worker_version.h"
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
 #include "base/strings/string16.h"
 #include "content/browser/service_worker/embedded_worker_instance.h"
@@ skipping 83 matching lines @@
     const GURL& script_url,
     int64 version_id,
     base::WeakPtr<ServiceWorkerContextCore> context)
     : version_id_(version_id),
       registration_id_(kInvalidServiceWorkerVersionId),
       script_url_(script_url),
       status_(NEW),
       context_(context),
       script_cache_map_(this, context),
       is_doomed_(false),
+      creation_time_(base::Time::Now()),

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

oh, i thought this would mean when version was created in storage?

What meta data do we want to expose around dates/times/sizes? Looks like that
should be reflected in ServiceWorkerRegistrationInfo and
ServiceWorkerVersionInfo and also in ServiceWorkerUsageInfo for the public api.

At the level of the public api, does this make sense?
 create_date()  // when first registered?
 modification_date() // when last updated?
 last_access_date()  // when last used in some capacity?
 size()  // byte cound of script resources saved to disk?

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

Mind if I do this in a next patch?

       weak_factory_(this) {
   DCHECK(context_);
   DCHECK(registration);
   if (registration) {
     registration_id_ = registration->id();
     scope_ = registration->pattern();
   }
   context_->AddLiveVersion(this);
   embedded_worker_ = context_->embedded_worker_registry()->CreateWorker();
   embedded_worker_->AddListener(this);
@@ skipping 575 matching lines @@
   SetStatus(REDUNDANT);
   StopWorker(base::Bind(&ServiceWorkerUtils::NoOpStatusCallback));
   if (!context_)
     return;
   std::vector<ServiceWorkerDatabase::ResourceRecord> resources;
   script_cache_map_.GetResources(&resources);
   context_->storage()->PurgeResources(resources);
 }
 
 }  // namespace content