Privatize StrongBinding lifetime management

components/contextual_search/renderer/overlay_js_render_frame_observer.cc

Index: components/contextual_search/renderer/overlay_js_render_frame_observer.cc
diff --git a/components/contextual_search/renderer/overlay_js_render_frame_observer.cc b/components/contextual_search/renderer/overlay_js_render_frame_observer.cc
index f0ac88b1d751a3bd555fcf2556aecaf983575bde..9214a7772b5766685ee7f07c59371826b3995f32 100644
--- a/components/contextual_search/renderer/overlay_js_render_frame_observer.cc
+++ b/components/contextual_search/renderer/overlay_js_render_frame_observer.cc
@@ -10,6 +10,7 @@
 #include "components/contextual_search/renderer/contextual_search_wrapper.h"
 #include "components/contextual_search/renderer/overlay_page_notifier_service_impl.h"
 #include "content/public/renderer/render_frame.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
 #include "services/shell/public/cpp/interface_registry.h"
 #include "v8/include/v8.h"
 
@@ -35,8 +36,10 @@ void OverlayJsRenderFrameObserver::RegisterMojoInterface() {
 
 void OverlayJsRenderFrameObserver::CreateOverlayPageNotifierService(
     mojo::InterfaceRequest<mojom::OverlayPageNotifierService> request) {
-  new OverlayPageNotifierServiceImpl(weak_factory_.GetWeakPtr(),
-                                     std::move(request));
+  mojo::MakeStrongBinding(
+      base::MakeUnique<OverlayPageNotifierServiceImpl>(
+          weak_factory_.GetWeakPtr()),
+      std::move(request));
 }
 
 void OverlayJsRenderFrameObserver::SetIsContextualSearchOverlay() {