Revert of [DevTools] Consolidate overlay-related functionality in Overlay domain

headless/lib/browser/headless_devtools_client_impl.cc

Index: headless/lib/browser/headless_devtools_client_impl.cc
diff --git a/headless/lib/browser/headless_devtools_client_impl.cc b/headless/lib/browser/headless_devtools_client_impl.cc
index 0b6cc96930c91e1403d250aee160b6ade95d5428..9cb9de77f929fc210cd57872224d661676daa10b 100644
--- a/headless/lib/browser/headless_devtools_client_impl.cc
+++ b/headless/lib/browser/headless_devtools_client_impl.cc
@@ -59,6 +59,7 @@
       network_domain_(this),
       page_domain_(this),
       profiler_domain_(this),
+      rendering_domain_(this),
       runtime_domain_(this),
       security_domain_(this),
       service_worker_domain_(this),
@@ -328,6 +329,10 @@
   return &profiler_domain_;
 }
 
+rendering::Domain* HeadlessDevToolsClientImpl::GetRendering() {
+  return &rendering_domain_;
+}
+
 runtime::Domain* HeadlessDevToolsClientImpl::GetRuntime() {
   return &runtime_domain_;
 }