Declarative resource hints go through mojo IPC to //content

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 4c2131cb6b8ca0fb514714c4232ff6964f84e936..4d06d2ee91c4c82796e33285b91d5426cd97e577 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -75,6 +75,7 @@
 #include "content/browser/histogram_message_filter.h"
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 #include "content/browser/indexed_db/indexed_db_dispatcher_host.h"
+#include "content/browser/loader/resource_hints_handler_impl.h"
 #include "content/browser/loader/resource_message_filter.h"
 #include "content/browser/loader/resource_scheduler_filter.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
@@ -1032,6 +1033,9 @@ void RenderProcessHostImpl::RegisterMojoServices() {
       base::Bind(&PermissionServiceContext::CreateService,
                  base::Unretained(permission_service_context_.get())));
 
+  mojo_application_host_->service_registry()->AddService(base::Bind(
+      &ResourceHintsHandlerImpl::RegisterConnection, base::Unretained(this)));
+
   // TODO(mcasas): finalize arguments.
   mojo_application_host_->service_registry()->AddService(
       base::Bind(&ImageCaptureImpl::Create));