Add ASSERT() to avoid accidental leaking ServiceWorkerContainer to cross origin context.

Source/modules/serviceworkers/NavigatorServiceWorker.cpp

Index: Source/modules/serviceworkers/NavigatorServiceWorker.cpp
diff --git a/Source/modules/serviceworkers/NavigatorServiceWorker.cpp b/Source/modules/serviceworkers/NavigatorServiceWorker.cpp
index d2552311f9a3ba290dd69584d2e2b505c29e230f..d9b33d4c4cc412a1a52cfc8d08fb03e4580ba143 100644
--- a/Source/modules/serviceworkers/NavigatorServiceWorker.cpp
+++ b/Source/modules/serviceworkers/NavigatorServiceWorker.cpp
@@ -54,8 +54,9 @@ const char* NavigatorServiceWorker::supplementName()
     return "NavigatorServiceWorker";
 }
 
-ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(Navigator& navigator, ExceptionState& exceptionState)
+ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(ExecutionContext* executionContext, Navigator& navigator, ExceptionState& exceptionState)
 {
+    ASSERT(!navigator.frame() || executionContext->securityOrigin()->canAccessCheckSuborigins(navigator.frame()->securityContext()->securityOrigin()));
     return NavigatorServiceWorker::from(navigator).serviceWorker(exceptionState);
 }