Implement ServiceWorkerFetchDispatcher::MaybeStartNavigationPreload().

content/common/service_worker/service_worker_types.h

Index: content/common/service_worker/service_worker_types.h
diff --git a/content/common/service_worker/service_worker_types.h b/content/common/service_worker/service_worker_types.h
index 4dbe26f8e7ee0b13233ba9d247099be503017a66..391324d3c5a0c045e515e3f00d154e9ed168509b 100644
--- a/content/common/service_worker/service_worker_types.h
+++ b/content/common/service_worker/service_worker_types.h
@@ -10,6 +10,7 @@
 #include <map>
 #include <string>
 
+#include "base/callback.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
@@ -17,6 +18,7 @@
 #include "content/public/common/referrer.h"
 #include "content/public/common/request_context_frame_type.h"
 #include "content/public/common/request_context_type.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerClientType.h"
 #include "third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerResponseError.h"
@@ -29,6 +31,10 @@
 
 namespace content {
 
+namespace mojom {
+class URLLoaderFactory;
+}  // namespace mojom
+
 // Indicates the document main thread ID in the child process. This is used for
 // messaging between the browser process and the child process.
 static const int kDocumentMainThreadId = 0;
@@ -136,6 +142,11 @@ using ServiceWorkerHeaderMap =
 
 using ServiceWorkerHeaderList = std::vector<std::string>;
 
+// Callback function type to get a mojom::URLLoaderFactory interface by passing
+// URLLoaderFactoryRequest. Returns false if failed.
+using MojoURLLoaderFactoryGetter =
+    base::Callback<bool(mojo::InterfaceRequest<mojom::URLLoaderFactory>)>;
+
 // To dispatch fetch request from browser to child process.
 struct CONTENT_EXPORT ServiceWorkerFetchRequest {
   ServiceWorkerFetchRequest();