Make //content responsible for generating notification Ids

content/renderer/service_worker/service_worker_context_client.cc

Index: content/renderer/service_worker/service_worker_context_client.cc
diff --git a/content/renderer/service_worker/service_worker_context_client.cc b/content/renderer/service_worker/service_worker_context_client.cc
index 4db7e3ac4b13e923483dd1e665d1324e40b6e776..86026ad6d87b2d8e0a9b2c879612b804bde06f72 100644
--- a/content/renderer/service_worker/service_worker_context_client.cc
+++ b/content/renderer/service_worker/service_worker_context_client.cc
@@ -835,26 +835,24 @@ void ServiceWorkerContextClient::OnFetchEvent(
 
 void ServiceWorkerContextClient::OnNotificationClickEvent(
     int request_id,
-    int64_t persistent_notification_id,
+    const std::string& notification_id,
     const PlatformNotificationData& notification_data,
     int action_index) {
   TRACE_EVENT0("ServiceWorker",
                "ServiceWorkerContextClient::OnNotificationClickEvent");
   proxy_->dispatchNotificationClickEvent(
-      request_id,
-      persistent_notification_id,
-      ToWebNotificationData(notification_data),
-      action_index);
+      request_id, blink::WebString::fromUTF8(notification_id),
+      ToWebNotificationData(notification_data), action_index);
 }
 
 void ServiceWorkerContextClient::OnNotificationCloseEvent(
     int request_id,
-    int64_t persistent_notification_id,
+    const std::string& notification_id,
     const PlatformNotificationData& notification_data) {
   TRACE_EVENT0("ServiceWorker",
                "ServiceWorkerContextClient::OnNotificationCloseEvent");
   proxy_->dispatchNotificationCloseEvent(
-      request_id, persistent_notification_id,
+      request_id, blink::WebString::fromUTF8(notification_id),
       ToWebNotificationData(notification_data));
 }