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 85c1ca0085339f3028beffa11bad20dfeb6f27a2..2ca07c7497486da2dc9c4ce2d8f04cf6e4ad20c7 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_controller.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"
@@ -1072,6 +1073,9 @@ void RenderProcessHostImpl::RegisterMojoServices() {
       base::Bind(&PermissionServiceContext::CreateService,
                  base::Unretained(permission_service_context_.get())));
 
+  mojo_application_host_->service_registry()->AddService(base::Bind(
+      &ResourceHintsController::RegisterConnection, base::Unretained(this)));
+
   // TODO(mcasas): finalize arguments.
   mojo_application_host_->service_registry()->AddService(
       base::Bind(&ImageCaptureImpl::Create));