PlzNavigate: Make ServiceWorker work with PlzNavigate.

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index 3ed83774684c3564207ada5eeda8081c506e3b9b..f789bf3e21d4d54a4ea9221de66d6629f24ed8cc 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -268,10 +268,14 @@ struct CONTENT_EXPORT RequestNavigationParams {
   bool should_clear_history_list;
 
   // PlzNavigate
-  // The ServiceWorkerProviderHost ID used for navigations.
-  // Set to kInvalidServiceWorkerProviderId for sandboxed frames and sync loads.
-  // This parameter is not used in the current navigation architecture, where it
-  // will always be equal to kInvalidServiceWorkerProviderId.
+  // Whether a ServiceWorkerProviderHost should be created for the window.
+  bool should_create_service_worker;
+
+  // PlzNavigate
+  // The ServiceWorkerProviderHost ID used for navigations, if it was already
+  // created by the browser. Set to kInvalidServiceWorkerProviderId otherwise.
+  // This parameter is not used in the current navigation architecture, where
+  // it will always be equal to kInvalidServiceWorkerProviderId.
   int service_worker_provider_id;
 };