Implement ServiceWorkerFetchDispatcher::MaybeStartNavigationPreload().

content/browser/service_worker/service_worker_dispatcher_host.h

Index: content/browser/service_worker/service_worker_dispatcher_host.h
diff --git a/content/browser/service_worker/service_worker_dispatcher_host.h b/content/browser/service_worker/service_worker_dispatcher_host.h
index 9aa1f97a5aae2845fadd3e3c679b7f507aaf053b..454a0addf18fac7cdad41b4f28c81dcdc6d28ae8 100644
--- a/content/browser/service_worker/service_worker_dispatcher_host.h
+++ b/content/browser/service_worker/service_worker_dispatcher_host.h
@@ -10,6 +10,7 @@
 #include <memory>
 #include <vector>
 
+#include "base/callback.h"
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ -19,16 +20,21 @@
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "mojo/public/cpp/bindings/associated_binding_set.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
 
 class GURL;
 struct EmbeddedWorkerHostMsg_ReportConsoleMessage_Params;
 
 namespace url {
 class Origin;
-}
+}  // namespace url
 
 namespace content {
 
+namespace mojom {
+class URLLoaderFactory;
+}  // namespace mojom
+
 class MessagePortMessageFilter;
 class ResourceContext;
 class ServiceWorkerContextCore;
@@ -47,10 +53,14 @@ class CONTENT_EXPORT ServiceWorkerDispatcherHost
     : public mojom::ServiceWorkerDispatcherHost,
       public BrowserMessageFilter {
  public:
+  using URLLoaderFactoryCallback =
+      base::Callback<bool(mojo::InterfaceRequest<mojom::URLLoaderFactory>)>;
+
   ServiceWorkerDispatcherHost(
       int render_process_id,
       MessagePortMessageFilter* message_port_message_filter,
-      ResourceContext* resource_context);
+      ResourceContext* resource_context,
+      const URLLoaderFactoryCallback& url_loader_factory_callback);
 
   void Init(ServiceWorkerContextWrapper* context_wrapper);
 
@@ -85,6 +95,10 @@ class CONTENT_EXPORT ServiceWorkerDispatcherHost
     return message_port_message_filter_;
   }
 
+  URLLoaderFactoryCallback url_loader_factory_callback() const {
+    return url_loader_factory_callback_;
+  }
+
  protected:
   ~ServiceWorkerDispatcherHost() override;
 
@@ -242,6 +256,7 @@ class CONTENT_EXPORT ServiceWorkerDispatcherHost
   const int render_process_id_;
   MessagePortMessageFilter* const message_port_message_filter_;
   ResourceContext* resource_context_;
+  const URLLoaderFactoryCallback url_loader_factory_callback_;
   scoped_refptr<ServiceWorkerContextWrapper> context_wrapper_;
 
   IDMap<ServiceWorkerHandle, IDMapOwnPointer> handles_;