Support Service Worker NavigationPreload with PlzNavigate.

content/browser/service_worker/service_worker_navigation_handle_core.h

Index: content/browser/service_worker/service_worker_navigation_handle_core.h
diff --git a/content/browser/service_worker/service_worker_navigation_handle_core.h b/content/browser/service_worker/service_worker_navigation_handle_core.h
index 88e5013c9d20ac5fb2b5d735023f84eab912e250..0fb22e9ec434f5a56dd690dd54325ba925da0ad9 100644
--- a/content/browser/service_worker/service_worker_navigation_handle_core.h
+++ b/content/browser/service_worker/service_worker_navigation_handle_core.h
@@ -13,22 +13,25 @@
 
 namespace content {
 
+class ResourceMessageFilter;
 class ServiceWorkerContextWrapper;
 class ServiceWorkerNavigationHandle;
 class ServiceWorkerProviderHost;
 
 // PlzNavigate
 // This class is used to manage the lifetime of ServiceWorkerProviderHosts
-// created during navigations. This class is created on the UI thread, but
-// should only be accessed from the IO thread afterwards. It is the IO thread
-// pendant of ServiceWorkerNavigationHandle. See the
-// ServiceWorkerNavigationHandle header for more details about the lifetime of
-// both classes.
+// created during navigations. And also it is used to pass the pointer of
+// ResourceMessageFilter for navigation preload from the UI thread to the IO
+// thread. This class is created on the UI thread, but should only be accessed
+// from the IO thread afterwards. It is the IO thread pendant of
+// ServiceWorkerNavigationHandle. See the ServiceWorkerNavigationHandle header
+// for more details about the lifetime of both classes.
 class ServiceWorkerNavigationHandleCore {
  public:
   ServiceWorkerNavigationHandleCore(
       base::WeakPtr<ServiceWorkerNavigationHandle> ui_handle,
-      ServiceWorkerContextWrapper* context_wrapper);
+      ServiceWorkerContextWrapper* context_wrapper,
+      ResourceMessageFilter* resource_message_filter);
   ~ServiceWorkerNavigationHandleCore();
 
   // Called when a ServiceWorkerProviderHost was pre-created for the navigation
@@ -48,6 +51,7 @@ class ServiceWorkerNavigationHandleCore {
  private:
   std::unique_ptr<ServiceWorkerProviderHost> precreated_host_;
   scoped_refptr<ServiceWorkerContextWrapper> context_wrapper_;
+  scoped_refptr<ResourceMessageFilter> resource_message_filter_;
   base::WeakPtr<ServiceWorkerNavigationHandle> ui_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerNavigationHandleCore);