Implement ServiceWorkerFetchDispatcher::MaybeStartNavigationPreload().

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1138 matching lines @@
                  base::Unretained(widget_helper_.get())));
   AddFilter(message_port_message_filter_.get());
 
   scoped_refptr<CacheStorageDispatcherHost> cache_storage_filter =
       new CacheStorageDispatcherHost();
   cache_storage_filter->Init(storage_partition_impl_->GetCacheStorageContext());
   AddFilter(cache_storage_filter.get());
 
   scoped_refptr<ServiceWorkerDispatcherHost> service_worker_filter =
       new ServiceWorkerDispatcherHost(
-          GetID(), message_port_message_filter_.get(), resource_context);
+          GetID(), message_port_message_filter_.get(), resource_context,
+          base::Bind(&RenderProcessHostImpl::CreateURLLoaderFactory,
+                     weak_factory_.GetWeakPtr()));
   service_worker_filter->Init(
       storage_partition_impl_->GetServiceWorkerContext());
   AddFilter(service_worker_filter.get());
 
   AddFilter(new SharedWorkerMessageFilter(
       GetID(), resource_context,
       WorkerStoragePartition(
           storage_partition_impl_->GetURLRequestContext(),
           storage_partition_impl_->GetMediaURLRequestContext(),
           storage_partition_impl_->GetAppCacheService(),
@@ skipping 1831 matching lines @@
                                         const std::string& error) {
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing. Alias
   // enough information here so that we can determine what the bad message was.
   base::debug::Alias(&error);
   bad_message::ReceivedBadMessage(render_process_id,
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
+// static
+bool RenderProcessHostImpl::CreateURLLoaderFactory(
+    base::WeakPtr<RenderProcessHostImpl> weak_host,
+    mojo::InterfaceRequest<mojom::URLLoaderFactory> request) {

[sadrul, 2016/10/19 14:42:43]

This doesn't need to be a static, right?

[horo, 2016/10/19 14:48:41]

I want to return false if RenderProcessHostImpl was deleted.
So I think this method must be static.

[sadrul, 2016/10/19 15:13:31]

I think the return type can be void, and you can check if the callback has been
canceled (using base::Callback::IsCanceled()) instead.

[horo, 2016/10/19 16:08:02]

Ah, sounds good.
Done.

+  if (!weak_host)
+    return false;
+  URLLoaderFactoryImpl::Create(weak_host->resource_message_filter_,
+                               std::move(request));
+  return true;
+}
+
 }  // namespace content