[IndexedDB] Adding async tracing for renderer calls.

third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp

Index: third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
index 29c07634f929ebda4159350a7446af38d35ce624..8af2527d040f888f446f176859b94033eb8441a8 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
@@ -65,6 +65,10 @@ static bool IsContextValid(ExecutionContext* context) {
 
 IDBRequest* IDBFactory::GetDatabaseNames(ScriptState* script_state,
                                          ExceptionState& exception_state) {
+  IDB_TRACE("IDBFactory::getDatabaseNamesRequestSetup");
+  IDBRequest::AsyncTraceState metrics("IDBFactory::getDatabaseNames", this);
+  IDBRequest* request = IDBRequest::Create(script_state, IDBAny::CreateNull(),
+                                           nullptr, std::move(metrics));
   // TODO(jsbell): Used only by inspector; remove unneeded checks/exceptions?
   if (!IsContextValid(ExecutionContext::From(script_state)))
     return nullptr;
@@ -76,9 +80,6 @@ IDBRequest* IDBFactory::GetDatabaseNames(ScriptState* script_state,
     return nullptr;
   }
 
-  IDBRequest* request =
-      IDBRequest::Create(script_state, IDBAny::CreateNull(), nullptr);
-
   if (!IndexedDBClient::From(ExecutionContext::From(script_state))
            ->AllowIndexedDB(ExecutionContext::From(script_state),
                             "Database Listing")) {