Handle interfaces with a ServiceName in the go bindings generator.

mojom/generators/go/templates/interfaces_test.go

Index: mojom/generators/go/templates/interfaces_test.go
diff --git a/mojom/generators/go/templates/interfaces_test.go b/mojom/generators/go/templates/interfaces_test.go
index 684749a4e1e0732574f188bae4b18327214e2026..aa2893e4f4d1c7bacf588bddcaf7ca7739e985a3 100644
--- a/mojom/generators/go/templates/interfaces_test.go
+++ b/mojom/generators/go/templates/interfaces_test.go
@@ -64,3 +64,28 @@ const someInterface_SecondMethod_Ordinal uint32 = 21
 
 	check(t, expected, "MethodOrdinals", i)
 }
+
+func TestServiceName(t *testing.T) {
+	expected := `const someInterface_Name string = "SomeService"
+
+func (r *SomeInterface_Request) Name() string {
+	return someInterface_Name
+}
+
+func (p *SomeInterface_Pointer) Name() string {
+	return someInterface_Name
+}
+
+func (f *SomeInterface_ServiceFactory) Name() string {
+	return someInterface_Name
+}`
+
+	serviceName := "SomeService"
+	i := translator.InterfaceTemplate{
+		Name:        "SomeInterface",
+		PrivateName: "someInterface",
+		ServiceName: &serviceName,
+	}
+
+	check(t, expected, "ServiceDecl", i)
+}