Push API: move PushManager from Navigator to ServiceWorkerRegistration [switchover 6/6]

Source/modules/push_messaging/PushManager.h

Index: Source/modules/push_messaging/PushManager.h
diff --git a/Source/modules/push_messaging/PushManager.h b/Source/modules/push_messaging/PushManager.h
index 7596e71292ccfa29430bd3cb424f93fee901b27a..27b86a9c5ea9b7304dd386b465844c167e74cff6 100644
--- a/Source/modules/push_messaging/PushManager.h
+++ b/Source/modules/push_messaging/PushManager.h
@@ -12,22 +12,25 @@ namespace blink {
 
 class ScriptPromise;
 class ScriptState;
+class ServiceWorkerRegistration;
 
 class PushManager final : public GarbageCollected<PushManager>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PushManager* create()
+    static PushManager* create(ServiceWorkerRegistration* registration)
     {
-        return new PushManager();
+        return new PushManager(registration);
     }
 
     ScriptPromise registerPushMessaging(ScriptState*);
     ScriptPromise hasPermission(ScriptState*);
 
-    void trace(Visitor*) { }
+    void trace(Visitor*);
 
 private:
-    PushManager();
+    explicit PushManager(ServiceWorkerRegistration*);
+
+    Member<ServiceWorkerRegistration> m_registration;
 };
 
 } // namespace blink