Change FilterChain::Append() to a template method.

mojo/public/cpp/bindings/lib/interface_impl_internal.h

Index: mojo/public/cpp/bindings/lib/interface_impl_internal.h
diff --git a/mojo/public/cpp/bindings/lib/interface_impl_internal.h b/mojo/public/cpp/bindings/lib/interface_impl_internal.h
index e661290fece266cc2ae6bdcab5b10e50c61a3e56..77652909a5fc90c61f03c44ec55cb31f0be51c57 100644
--- a/mojo/public/cpp/bindings/lib/interface_impl_internal.h
+++ b/mojo/public/cpp/bindings/lib/interface_impl_internal.h
@@ -56,9 +56,9 @@ class InterfaceImplState : public ErrorHandler {
     assert(!router_);
 
     FilterChain filters;
-    filters.Append(new MessageHeaderValidator)
-           .Append(new typename Interface::RequestValidator_)
-           .Append(new typename Interface::Client::ResponseValidator_);
+    filters.Append<MessageHeaderValidator>();
+    filters.Append<typename Interface::RequestValidator_>();
+    filters.Append<typename Interface::Client::ResponseValidator_>();
 
     router_ = new Router(handle.Pass(), filters.Pass(), waiter);
     router_->set_incoming_receiver(&stub_);