Add a stub implementation of the URLLoaderFactory for AppCache.

content/browser/appcache/appcache_request_handler.h

Index: content/browser/appcache/appcache_request_handler.h
diff --git a/content/browser/appcache/appcache_request_handler.h b/content/browser/appcache/appcache_request_handler.h
index 0e3450f2881ffc61b1fc61c5c23a1ec07b468300..3b7e16736d50b3198620f2e4367daa3bce0686e3 100644
--- a/content/browser/appcache/appcache_request_handler.h
+++ b/content/browser/appcache/appcache_request_handler.h
@@ -17,7 +17,6 @@
 #include "content/browser/appcache/appcache_host.h"
 #include "content/browser/appcache/appcache_service_impl.h"
 #include "content/common/content_export.h"
-#include "content/common/url_loader_factory.mojom.h"
 #include "content/public/common/resource_type.h"
 
 namespace net {
@@ -27,11 +26,9 @@ class URLRequest;
 
 namespace content {
 class AppCacheJob;
-class AppCacheNavigationHandleCore;
 class AppCacheRequest;
 class AppCacheRequestHandlerTest;
 class AppCacheURLRequestJob;
-class ResourceContext;
 
 // An instance is created for each net::URLRequest. The instance survives all
 // http transactions involved in the processing of its net::URLRequest, and is
@@ -72,20 +69,6 @@ class CONTENT_EXPORT AppCacheRequestHandler
            type == RESOURCE_TYPE_SHARED_WORKER;
   }
 
-  // PlzNavigate and --enable-network-service.
-  // Checks whether the |resource_request| can be served out of the AppCache
-  // and invokes the |callback| accordingly. If the request can be served
-  // out of the AppCache, we could return a URLLoaderFactory which can serve
-  // requests out of the AppCache to the callback, or we could create the
-  // loader right there. At this point we are leaning towards the latter.
-  static void InitializeForNavigationNetworkService(
-      std::unique_ptr<ResourceRequest> resource_request,
-      ResourceContext* resource_context,
-      AppCacheNavigationHandleCore* navigation_handle_core,
-      ResourceType resource_type,
-      base::Callback<void(mojom::URLLoaderFactoryPtrInfo,
-                          std::unique_ptr<ResourceRequest>)> callback);
-
  private:
   friend class AppCacheHost;