Integrate mojo localstorage implementation with DOMStorageContext API.

content/browser/dom_storage/local_storage_context_mojo.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/browser/dom_storage/local_storage_context_mojo.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "components/leveldb/public/cpp/util.h"
 #include "components/leveldb/public/interfaces/leveldb.mojom.h"
@@ skipping 79 matching lines @@
   wrapper->ScheduleImmediateCommit();
 }
 
 void LocalStorageContextMojo::DeleteStorageForPhysicalOrigin(
     const url::Origin& origin) {
   GetStorageUsage(base::BindOnce(
       &LocalStorageContextMojo::OnGotStorageUsageForDeletePhysicalOrigin,
       weak_ptr_factory_.GetWeakPtr(), origin));
 }
 
+void LocalStorageContextMojo::Flush() {
+  for (const auto& it : level_db_wrappers_)
+    it.second->ScheduleImmediateCommit();
+}
+
 void LocalStorageContextMojo::SetDatabaseForTesting(
     leveldb::mojom::LevelDBDatabasePtr database) {
   DCHECK_EQ(connection_state_, NO_CONNECTION);
   connection_state_ = CONNECTION_IN_PROGRESS;
   database_ = std::move(database);
   OnDatabaseOpened(leveldb::mojom::DatabaseError::OK);
 }
 
 void LocalStorageContextMojo::RunWhenConnected(base::OnceClosure callback) {
   // If we don't have a filesystem_connection_, we'll need to establish one.
@@ skipping 249 matching lines @@
   for (const auto& info : usage) {
     url::Origin origin_candidate(info.origin);
     if (!origin_candidate.IsSameOriginWith(origin) &&
         origin_candidate.IsSamePhysicalOriginWith(origin))
       DeleteStorage(origin_candidate);
   }
   DeleteStorage(origin);
 }
 
 }  // namespace content