Update the PushEvent to have a nullable PushMessageData

content/browser/push_messaging/push_messaging_router.cc

Index: content/browser/push_messaging/push_messaging_router.cc
diff --git a/content/browser/push_messaging/push_messaging_router.cc b/content/browser/push_messaging/push_messaging_router.cc
index bc95216ad07698514323caf241f6a1542273660d..5206153e8d53dbfe800b4df2f63e4048330fb52e 100644
--- a/content/browser/push_messaging/push_messaging_router.cc
+++ b/content/browser/push_messaging/push_messaging_router.cc
@@ -34,7 +34,7 @@ void PushMessagingRouter::DeliverMessage(
     BrowserContext* browser_context,
     const GURL& origin,
     int64_t service_worker_registration_id,
-    const std::string& data,
+    const content::PushEventPayload& payload,
     const DeliverMessageCallback& deliver_message_callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   StoragePartition* partition =
@@ -45,15 +45,15 @@ void PushMessagingRouter::DeliverMessage(
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&PushMessagingRouter::FindServiceWorkerRegistration, origin,
-                 service_worker_registration_id, data, deliver_message_callback,
-                 service_worker_context));
+                 service_worker_registration_id, payload,
+                 deliver_message_callback, service_worker_context));
 }
 
 // static
 void PushMessagingRouter::FindServiceWorkerRegistration(
     const GURL& origin,
     int64_t service_worker_registration_id,
-    const std::string& data,
+    const content::PushEventPayload& payload,
     const DeliverMessageCallback& deliver_message_callback,
     scoped_refptr<ServiceWorkerContextWrapper> service_worker_context) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
@@ -62,12 +62,12 @@ void PushMessagingRouter::FindServiceWorkerRegistration(
   service_worker_context->FindReadyRegistrationForId(
       service_worker_registration_id, origin,
       base::Bind(&PushMessagingRouter::FindServiceWorkerRegistrationCallback,
-                 data, deliver_message_callback));
+                 payload, deliver_message_callback));
 }
 
 // static
 void PushMessagingRouter::FindServiceWorkerRegistrationCallback(
-    const std::string& data,
+    const content::PushEventPayload& payload,
     const DeliverMessageCallback& deliver_message_callback,
     ServiceWorkerStatusCode service_worker_status,
     const scoped_refptr<ServiceWorkerRegistration>&
@@ -91,7 +91,7 @@ void PushMessagingRouter::FindServiceWorkerRegistrationCallback(
       base::Bind(&PushMessagingRouter::DeliverMessageEnd,
                  deliver_message_callback, service_worker_registration);
 
-  version->DispatchPushEvent(dispatch_event_callback, data);
+  version->DispatchPushEvent(dispatch_event_callback, payload);
 }
 
 // static