[tracing] Show the local storage databases under dom_storage

content/browser/dom_storage/local_storage_database_adapter.cc

Index: content/browser/dom_storage/local_storage_database_adapter.cc
diff --git a/content/browser/dom_storage/local_storage_database_adapter.cc b/content/browser/dom_storage/local_storage_database_adapter.cc
index 0be1cc0927c34f0110aef39e511e7a6850e6bcd3..f177c9b1bf9f4d8f81056e1c4e3c700a625c4b52 100644
--- a/content/browser/dom_storage/local_storage_database_adapter.cc
+++ b/content/browser/dom_storage/local_storage_database_adapter.cc
@@ -33,6 +33,12 @@ 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()) {
 }