Handle interfaces with a ServiceName in the go bindings generator.

mojom/generators/go/translator/mojom_file.go

Index: mojom/generators/go/translator/mojom_file.go
diff --git a/mojom/generators/go/translator/mojom_file.go b/mojom/generators/go/translator/mojom_file.go
index efc05faae72b849d0cb2a190c15a86d5be3e9964..2ba381cee2f8042daae8e5cdc071608bccfd65bf 100644
--- a/mojom/generators/go/translator/mojom_file.go
+++ b/mojom/generators/go/translator/mojom_file.go
@@ -12,6 +12,7 @@ type TmplFile struct {
 	Structs     []*StructTemplate
 	Unions      []*UnionTemplate
 	Enums       []*EnumTemplate
+	Interfaces  []*InterfaceTemplate
 }
 
 type Import struct {
@@ -125,6 +126,9 @@ type InterfaceTemplate struct {
 	// PrivateName is identical to Name with the first letter lower cased.
 	PrivateName string
 
+	// ServiceName is the service name of the interface.
+	ServiceName *string
+
 	// Methods contains the list of methods of the interface.
 	Methods []MethodTemplate
 }