Restrict CM API interface request and message dispatch.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index d15b46580d7ac3baa908bd5adccf85107da9c274..1f3d42813792b6bcaae51cc8408eb9777c7f3e80 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -924,9 +924,11 @@ bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
 void RenderFrameHostImpl::OnAssociatedInterfaceRequest(
     const std::string& interface_name,
     mojo::ScopedInterfaceEndpointHandle handle) {
+  ContentBrowserClient* browser_client = GetContentClient()->browser();
   if (associated_registry_->CanBindRequest(interface_name)) {
     associated_registry_->BindRequest(interface_name, std::move(handle));
-  } else {
+  } else if (!browser_client->BindAssociatedInterfaceRequestFromFrame(
+                 this, interface_name, &handle)) {
     delegate_->OnAssociatedInterfaceRequest(this, interface_name,
                                             std::move(handle));
   }