Use OnceCallback for Mojo binding connection error handlers.

mojo/public/cpp/bindings/interface_ptr.h

Index: mojo/public/cpp/bindings/interface_ptr.h
diff --git a/mojo/public/cpp/bindings/interface_ptr.h b/mojo/public/cpp/bindings/interface_ptr.h
index 9262d13aa40122fa5031b7c74fd1daa626bf5875..2eb93684fe6080074f4064f3f43682d54acdda33 100644
--- a/mojo/public/cpp/bindings/interface_ptr.h
+++ b/mojo/public/cpp/bindings/interface_ptr.h
@@ -153,13 +153,14 @@ class InterfacePtr {
   //
   // This method may only be called after the InterfacePtr has been bound to a
   // message pipe.
-  void set_connection_error_handler(const base::Closure& error_handler) {
-    internal_state_.set_connection_error_handler(error_handler);
+  void set_connection_error_handler(base::OnceClosure error_handler) {
+    internal_state_.set_connection_error_handler(std::move(error_handler));
   }
 
   void set_connection_error_with_reason_handler(
-      const ConnectionErrorWithReasonCallback& error_handler) {
-    internal_state_.set_connection_error_with_reason_handler(error_handler);
+      ConnectionErrorWithReasonCallback error_handler) {
+    internal_state_.set_connection_error_with_reason_handler(
+        std::move(error_handler));
   }
 
   // Unbinds the InterfacePtr and returns the information which could be used