Enable mojo localstorage to actually store on disk.

content/renderer/dom_storage/local_storage_cached_area.cc

 // Copyright 2016 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/renderer/dom_storage/local_storage_cached_area.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/rand_util.h"
@@ skipping 133 matching lines @@
   ignore_key_mutations_[key]++;
   leveldb_->Delete(String16ToUint8Vector(key),
                    PackSource(page_url, storage_area_id),
                    base::Bind(&LocalStorageCachedArea::OnRemoveItemComplete,
                               weak_factory_.GetWeakPtr(), key));
 }
 
 void LocalStorageCachedArea::Clear(const GURL& page_url,
                                    const std::string& storage_area_id) {
   // No need to prime the cache in this case.
-
   Reset();
   map_ = new DOMStorageMap(kPerStorageAreaQuota);
   ignore_all_mutations_ = true;
   leveldb_->DeleteAll(PackSource(page_url, storage_area_id),
                       base::Bind(&LocalStorageCachedArea::OnClearComplete,
                                   weak_factory_.GetWeakPtr()));
 }
 
 void LocalStorageCachedArea::AreaCreated(LocalStorageArea* area) {
   areas_[area->id()] = area;
@@ skipping 200 matching lines @@
 }
 
 void LocalStorageCachedArea::Reset() {
   map_ = NULL;
   ignore_key_mutations_.clear();
   ignore_all_mutations_ = false;
   weak_factory_.InvalidateWeakPtrs();
 }
 
 }  // namespace content