Support Service Worker NavigationPreload with PlzNavigate.

content/browser/service_worker/service_worker_fetch_dispatcher.cc

Index: content/browser/service_worker/service_worker_fetch_dispatcher.cc
diff --git a/content/browser/service_worker/service_worker_fetch_dispatcher.cc b/content/browser/service_worker/service_worker_fetch_dispatcher.cc
index f26bb19ff3ed0398fe4fe9c6758ba319ac276d02..3749e2a12c40bec5e50a4ee9474be8ccbffbafbd 100644
--- a/content/browser/service_worker/service_worker_fetch_dispatcher.cc
+++ b/content/browser/service_worker/service_worker_fetch_dispatcher.cc
@@ -281,7 +281,8 @@ void ServiceWorkerFetchDispatcher::Complete(
 }
 
 void ServiceWorkerFetchDispatcher::MaybeStartNavigationPreload(
-    net::URLRequest* original_request) {
+    net::URLRequest* original_request,
+    base::WeakPtr<ServiceWorkerProviderHost> provider_host) {
   if (resource_type_ != RESOURCE_TYPE_MAIN_FRAME &&
       resource_type_ != RESOURCE_TYPE_SUB_FRAME) {
     return;
@@ -297,19 +298,20 @@ void ServiceWorkerFetchDispatcher::MaybeStartNavigationPreload(
     // Origin-Trial for NavigationPreload.
     return;
   }
-  if (IsBrowserSideNavigationEnabled()) {
-    // TODO(horo): Support NavigationPreload with PlzNavigate.
-    NOTIMPLEMENTED();
-    return;
-  }
 
   const ResourceRequestInfoImpl* original_info =
       ResourceRequestInfoImpl::ForRequest(original_request);
-  if (!original_info->filter())
-    return;
+  ResourceMessageFilter* filter = original_info->filter();
+  if (!filter) {
+    DCHECK(IsBrowserSideNavigationEnabled());
+    if (!provider_host)
+      return;
+    filter = provider_host->resource_filter_for_navigation_preload();
+  }
+  DCHECK(filter);
+
   mojom::URLLoaderFactoryPtr factory;
-  URLLoaderFactoryImpl::Create(original_info->filter(),
-                               mojo::GetProxy(&factory));
+  URLLoaderFactoryImpl::Create(filter, mojo::GetProxy(&factory));
 
   preload_handle_ = mojom::FetchEventPreloadHandle::New();