Update the network service from the Mojo repo.

mojo/services/network/network_service_impl.cc

Index: mojo/services/network/network_service_impl.cc
diff --git a/mojo/services/network/network_service_impl.cc b/mojo/services/network/network_service_impl.cc
index 6f2f5502d645d78dbf466e2e3558922814fe6d0f..708208a2b8159d11a7e1813e5560096bfb737a14 100644
--- a/mojo/services/network/network_service_impl.cc
+++ b/mojo/services/network/network_service_impl.cc
@@ -25,7 +25,10 @@ NetworkServiceImpl::~NetworkServiceImpl() {
 
 void NetworkServiceImpl::CreateURLLoader(InterfaceRequest<URLLoader> loader) {
   // TODO(darin): Plumb origin_. Use for CORS.
-  BindToRequest(new URLLoaderImpl(context_), &loader);
+  // The loader will delete itself when the pipe is closed, unless a request is
+  // in progress. In which case, the loader will delete itself when the request
+  // is finished.
+  new URLLoaderImpl(context_, loader.Pass());
 }
 
 void NetworkServiceImpl::GetCookieStore(InterfaceRequest<CookieStore> store) {