Dispatch push event to worker from PushServiceImpl#OnMessage.

content/browser/push_messaging_router.h

Index: content/browser/push_messaging_router.h
diff --git a/content/browser/push_messaging_router.h b/content/browser/push_messaging_router.h
new file mode 100644
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+++ b/content/browser/push_messaging_router.h
@@ -0,0 +1,68 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_PUSH_MESSAGING_ROUTER_H_
+#define CONTENT_BROWSER_PUSH_MESSAGING_ROUTER_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/service_worker/service_worker_status_code.h"
+#include "content/public/common/push_messaging_status.h"
+#include "url/gurl.h"
+
+namespace content {
+
+class BrowserContext;
+class ServiceWorkerContextWrapper;
+class ServiceWorkerRegistration;
+
+class PushMessagingRouter {
+ public:
+  typedef base::Callback<void(PushMessagingStatus /* push_messaging_status */)>
+      DeliverMessageCallback;
+
+  // Delivers a push message with |data| to the Service Worker identified by
+  // |origin| and |service_worker_registration_id|. Must be called on the UI
+  // thread.
+  static void DeliverMessage(
+      BrowserContext* browser_context,
+      const GURL& origin,
+      int64 service_worker_registration_id,
+      const std::string& data,
+      const DeliverMessageCallback& deliver_message_callback);
+
+ private:
+  // Attempts to find a Service Worker registration so that a push event can be
+  // dispatched. Must be called on the IO thread.
+  static void FindServiceWorkerRegistration(
+      const GURL& origin,
+      int64 service_worker_registration_id,
+      const std::string& data,
+      const DeliverMessageCallback& deliver_message_callback,
+      scoped_refptr<ServiceWorkerContextWrapper> service_worker_context);
+
+  // If a registration was successfully retrieved, dispatches a push event with
+  // |data| on the Service Worker identified by |service_worker_registration|.
+  // Must be called on the IO thread.
+  static void FindServiceWorkerRegistrationCallback(
+      const std::string& data,
+      const DeliverMessageCallback& deliver_message_callback,
+      ServiceWorkerStatusCode service_worker_status,
+      const scoped_refptr<ServiceWorkerRegistration>&
+          service_worker_registration);
+
+  // Gets called asynchronously after the Service Worker has dispatched the push
+  // event. Must be called on the IO thread.
+  static void DeliverMessageEnd(
+      const DeliverMessageCallback& deliver_message_callback,
+      const scoped_refptr<ServiceWorkerRegistration>&
+          service_worker_registration,
+      ServiceWorkerStatusCode service_worker_status);
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(PushMessagingRouter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_PUSH_MESSAGING_ROUTER_H_