Offer User Timing in workers

Source/modules/performance/WorkerGlobalScopePerformance.cpp

Index: Source/modules/performance/WorkerGlobalScopePerformance.cpp
diff --git a/Source/modules/performance/WorkerGlobalScopePerformance.cpp b/Source/modules/performance/WorkerGlobalScopePerformance.cpp
index bc31cd61df3d550a2d2985847c25c01811ec79a2..c7caaeb34a75297b7eed8a7bcf2ecc242bbef056 100644
--- a/Source/modules/performance/WorkerGlobalScopePerformance.cpp
+++ b/Source/modules/performance/WorkerGlobalScopePerformance.cpp
@@ -58,13 +58,13 @@ WorkerGlobalScopePerformance& WorkerGlobalScopePerformance::from(WorkerGlobalSco
 
 WorkerPerformance* WorkerGlobalScopePerformance::performance(WorkerGlobalScope& context)
 {
-    return from(context).performance();
+    return from(context).performance(&context);
 }
 
-WorkerPerformance* WorkerGlobalScopePerformance::performance()
+WorkerPerformance* WorkerGlobalScopePerformance::performance(WorkerGlobalScope* context)
 {
     if (!m_performance)
-        m_performance = WorkerPerformance::create();
+        m_performance = WorkerPerformance::create(context);
     return m_performance.get();
 }