[tracing] Show the local storage databases under dom_storage

content/browser/dom_storage/local_storage_database_adapter.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/dom_storage/local_storage_database_adapter.h"
 
 #include "base/files/file_util.h"
 #include "content/browser/dom_storage/dom_storage_database.h"
 
 namespace content {
@@ skipping 15 matching lines @@
 }
 
 void LocalStorageDatabaseAdapter::DeleteFiles() {
   sql::Connection::Delete(db_->file_path());
 }
 
 void LocalStorageDatabaseAdapter::Reset() {
   db_.reset(new DOMStorageDatabase(db_->file_path()));
 }
 
+void LocalStorageDatabaseAdapter::ReportMemoryUsage(
+    base::trace_event::ProcessMemoryDump* pmd,
+    const std::string& name) {
+  db_->ReportMemoryUsage(pmd, name);
+}
+
 LocalStorageDatabaseAdapter::LocalStorageDatabaseAdapter()
     : db_(new DOMStorageDatabase()) {
 }
 
 }  // namespace content