Add a user id parameter to connections

mojo/shell/public/cpp/lib/connection_impl.h

Index: mojo/shell/public/cpp/lib/connection_impl.h
diff --git a/mojo/shell/public/cpp/lib/connection_impl.h b/mojo/shell/public/cpp/lib/connection_impl.h
index 4fc34e7c6a17363aa8d37ef53b55e3d1ea787103..00e167f77d0fb8b1f1b9adb0b31bbefca4dcf16d 100644
--- a/mojo/shell/public/cpp/lib/connection_impl.h
+++ b/mojo/shell/public/cpp/lib/connection_impl.h
@@ -30,6 +30,7 @@ class ConnectionImpl : public Connection {
   ConnectionImpl(const std::string& connection_url,
                  const std::string& remote_url,
                  uint32_t remote_id,
+                 uint32_t remote_user_id,
                  shell::mojom::InterfaceProviderPtr remote_interfaces,
                  shell::mojom::InterfaceProviderRequest local_interfaces,
                  const std::set<std::string>& allowed_interfaces);
@@ -41,6 +42,7 @@ class ConnectionImpl : public Connection {
   // Connection:
   const std::string& GetConnectionURL() override;
   const std::string& GetRemoteApplicationURL() override;
+  uint32_t GetRemoteUserID() const override;
   void SetRemoteInterfaceProviderConnectionErrorHandler(
       const Closure& handler) override;
   bool GetRemoteApplicationID(uint32_t* remote_id) const override;
@@ -58,6 +60,7 @@ class ConnectionImpl : public Connection {
   uint32_t remote_id_;
   bool remote_ids_valid_;
   std::vector<Closure> remote_id_callbacks_;
+  uint32_t remote_user_id_;
 
   InterfaceRegistry local_registry_;
   shell::mojom::InterfaceProviderPtr remote_interfaces_;