Service CreateNewWindow on the UI thread with a new mojo interface

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 3e083e5a7adb37db146416784b3cc39e315f6910..69cb948731046052ea3b73919817fa5043a0d2c7 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -5201,6 +5201,12 @@ void RenderFrameImpl::FocusedNodeChangedForAccessibility(const WebNode& node) {
     render_accessibility()->AccessibilityFocusedNodeChanged(node);
 }
 
+mojom::FrameHostIPC* RenderFrameImpl::GetFrameHostIPC() {
+  if (!frame_host_ipc_)
+    GetRemoteAssociatedInterfaces()->GetInterface(&frame_host_ipc_);
+  return frame_host_ipc_.get();
+}
+
 // PlzNavigate
 void RenderFrameImpl::OnCommitNavigation(
     const ResourceResponseHead& response,