Update mojo sdk to rev cc531b32182099a5a034a99daff35ed5d38a61c8

mojo/public/cpp/bindings/interface_impl.h

Index: mojo/public/cpp/bindings/interface_impl.h
diff --git a/mojo/public/cpp/bindings/interface_impl.h b/mojo/public/cpp/bindings/interface_impl.h
index 091710317b7d6981cff41fa3a7a9df02af658ff1..5663cc3e302934acdc5c241e70efacbaba23cd34 100644
--- a/mojo/public/cpp/bindings/interface_impl.h
+++ b/mojo/public/cpp/bindings/interface_impl.h
@@ -41,11 +41,13 @@ class InterfaceImpl : public Interface, public ErrorHandler {
   Client* client() { return binding_.client(); }
   internal::Router* internal_router() { return binding_.internal_router(); }
 
+  // Implements ErrorHandler.
+  //
   // Called when the client is no longer connected to this instance. NOTE: The
   // client() method continues to return a non-null pointer after this method
   // is called. After this method is called, any method calls made on client()
   // will be silently ignored.
-  virtual void OnConnectionError() {}
+  void OnConnectionError() override {}
 
   void set_delete_on_error(bool delete_on_error) {
     error_handler_impl_.set_delete_on_error(delete_on_error);