[IndexedDB] Adding async tracing for renderer calls.

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 47 matching lines @@
   DCHECK(context->IsDocument() || context->IsWorkerGlobalScope());
   if (context->IsDocument()) {
     Document* document = ToDocument(context);
     return document->GetFrame() && document->GetPage();
   }
   return true;
 }
 
 IDBRequest* IDBFactory::getDatabaseNames(ScriptState* script_state,
                                          ExceptionState& exception_state) {
-  IDB_TRACE("IDBFactory::getDatabaseNames");
+  IDB_TRACE("IDBFactory::getDatabaseNamesCall");
+  auto metrics = WTF::MakeUnique<IDBRequest::ScopedMetricsTracker>(
+      nullptr, "IDBFactory::getDatabaseNames", this);
   if (!IsContextValid(ExecutionContext::From(script_state)))
     return nullptr;
   if (!ExecutionContext::From(script_state)
            ->GetSecurityOrigin()
            ->CanAccessDatabase()) {
     exception_state.ThrowSecurityError(
         "access to the Indexed Database API is denied in this context.");
     return nullptr;
   }
 
-  IDBRequest* request =
-      IDBRequest::Create(script_state, IDBAny::CreateNull(), nullptr);
+  IDBRequest* request = IDBRequest::Create(script_state, IDBAny::CreateNull(),
+                                           nullptr, std::move(metrics));
 
   if (!IndexedDBClient::From(ExecutionContext::From(script_state))
            ->AllowIndexedDB(ExecutionContext::From(script_state),
                             "Database Listing")) {
     request->EnqueueResponse(
         DOMException::Create(kUnknownError, kPermissionDeniedErrorMessage));
     return request;
   }
 
   Platform::Current()->IdbFactory()->GetDatabaseNames(
@@ skipping 132 matching lines @@
   if (!second->IsValid()) {
     exception_state.ThrowDOMException(kDataError,
                                       IDBDatabase::kNotValidKeyErrorMessage);
     return 0;
   }
 
   return static_cast<short>(first->Compare(second));
 }
 
 }  // namespace blink