Revert of Convert network hints to Mojo

components/network_hints/renderer/renderer_preconnect.cc

 // Copyright 2015 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.
 
 // See header file for description of RendererPreconnect class
 
 #include "components/network_hints/renderer/renderer_preconnect.h"
 
 #include "components/network_hints/common/network_hints_common.h"
-#include "components/network_hints/public/cpp/network_hints_param_traits.h"
+#include "components/network_hints/common/network_hints_messages.h"
 #include "content/public/renderer/render_thread.h"
-#include "services/shell/public/cpp/interface_provider.h"
 
 using content::RenderThread;
 
 namespace network_hints {
 
 RendererPreconnect::RendererPreconnect() {
 }
 
 RendererPreconnect::~RendererPreconnect() {
 }
 
 void RendererPreconnect::Preconnect(const GURL& url, bool allow_credentials) {
   if (!url.is_valid())
     return;
 
-  GetNetworkHints().Preconnect(url, allow_credentials, 1);
-}
-
-mojom::NetworkHints& RendererPreconnect::GetNetworkHints() {
-  DCHECK(content::RenderThread::Get());
-  if (!network_hints_) {
-    RenderThread::Get()->GetRemoteInterfaces()->GetInterface(
-        mojo::GetProxy(&network_hints_));
-  }
-  return *network_hints_;
+  RenderThread::Get()->Send(
+      new NetworkHintsMsg_Preconnect(url, allow_credentials, 1));
 }
 
 }  // namespace network_hints