Change userid from a uint32_t to a string guid

content/browser/frame_host/frame_mojo_shell.cc

Index: content/browser/frame_host/frame_mojo_shell.cc
diff --git a/content/browser/frame_host/frame_mojo_shell.cc b/content/browser/frame_host/frame_mojo_shell.cc
index 752cb78f038aa2aeb2c2addaa52eba2fcb465d1e..8b54af6ca95b6996c0219110d6fc6b2217cd49e7 100644
--- a/content/browser/frame_host/frame_mojo_shell.cc
+++ b/content/browser/frame_host/frame_mojo_shell.cc
@@ -49,7 +49,7 @@ void FrameMojoShell::BindRequest(mojo::shell::mojom::ConnectorRequest request) {
 // future we may need to support both.
 void FrameMojoShell::Connect(
     const mojo::String& application_name,
-    uint32_t user_id,
+    const mojo::String& user_id,
     mojo::shell::mojom::InterfaceProviderRequest services,
     mojo::shell::mojom::InterfaceProviderPtr /* exposed_services */,
     const mojo::shell::mojom::Connector::ConnectCallback& callback) {