Revert of Convert network hints to Mojo

components/network_hints/renderer/renderer_preconnect.cc

Index: components/network_hints/renderer/renderer_preconnect.cc
diff --git a/components/network_hints/renderer/renderer_preconnect.cc b/components/network_hints/renderer/renderer_preconnect.cc
index 61d1f2605463b6cb1e03ac0a3c208f8757649cdc..b353cb1cb4a4ff9025f084bb69a5d04d40e65e26 100644
--- a/components/network_hints/renderer/renderer_preconnect.cc
+++ b/components/network_hints/renderer/renderer_preconnect.cc
@@ -7,9 +7,8 @@
 #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;
 
@@ -25,16 +24,8 @@
   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