Purge in-memory localStorage areas if the # of areas exceeds the limit

webkit/dom_storage/dom_storage_context.cc

 // Copyright (c) 2012 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 "webkit/dom_storage/dom_storage_context.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/guid.h"
@@ skipping 149 matching lines @@
 }
 
 void DomStorageContext::PurgeMemory() {
   // We can only purge memory from the local storage namespace
   // which is backed by disk.
   // TODO(marja): Purge sessionStorage, too. (Requires changes to the FastClear
   // functionality.)
   StorageNamespaceMap::iterator found =
       namespaces_.find(kLocalStorageNamespaceId);
   if (found != namespaces_.end())
-    found->second->PurgeMemory();
+    found->second->PurgeMemory(DomStorageNamespace::PURGE_AGGRESSIVE);
 }
 
 void DomStorageContext::Shutdown() {
   is_shutdown_ = true;
   StorageNamespaceMap::const_iterator it = namespaces_.begin();
   for (; it != namespaces_.end(); ++it)
     it->second->Shutdown();
 
   if (localstorage_directory_.empty() && !session_storage_database_.get())
     return;
@@ skipping 234 matching lines @@
   if (!deletable_persistent_namespace_ids_.empty()) {
     task_runner_->PostDelayedTask(
         FROM_HERE, base::Bind(
             &DomStorageContext::DeleteNextUnusedNamespace,
             this),
         base::TimeDelta::FromSeconds(kSessionStoraceScavengingSeconds));
   }
 }
 
 }  // namespace dom_storage