Update the PushEvent to have a nullable PushMessageData

content/browser/browser_context.cc

 // Copyright (c) 2012 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.
 
 #include "content/public/browser/browser_context.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 237 matching lines @@
                  make_scoped_refptr(blob_context), path, offset, size,
                  expected_modification_time),
       callback);
 }
 
 // static
 void BrowserContext::DeliverPushMessage(
     BrowserContext* browser_context,
     const GURL& origin,
     int64_t service_worker_registration_id,
-    const std::string& data,
+    const PushEventPayload& payload,
     const base::Callback<void(PushDeliveryStatus)>& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  PushMessagingRouter::DeliverMessage(
-      browser_context, origin, service_worker_registration_id, data, callback);
+  PushMessagingRouter::DeliverMessage(browser_context, origin,
+                                      service_worker_registration_id, payload,
+                                      callback);
 }
 
 // static
 void BrowserContext::NotifyWillBeDestroyed(BrowserContext* browser_context) {
   // Service Workers must shutdown before the browser context is destroyed,
   // since they keep render process hosts alive and the codebase assumes that
   // render process hosts die before their profile (browser context) dies.
   ForEachStoragePartition(browser_context,
                           base::Bind(ShutdownServiceWorkerContext));
 }
@@ skipping 52 matching lines @@
 #endif  // !OS_IOS
 
 BrowserContext::~BrowserContext() {
 #if !defined(OS_IOS)
   if (GetUserData(kDownloadManagerKeyName))
     GetDownloadManager(this)->Shutdown();
 #endif
 }
 
 }  // namespace content