Handle interfaces with a ServiceName in the go bindings generator.

mojom/generators/go/translator/names.go

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package translator
 
 import (
         "fmt"
         "path/filepath"
         "strings"
@@ skipping 24 matching lines @@
         t.goTypeCache[typeKey] = goType
         return goType
 }
 
 func fileNameToPackageName(fileName string) string {
         base := filepath.Base(fileName)
         ext := filepath.Ext(base)
         return base[:len(base)-len(ext)]
 }
 
+func userDefinedTypeDeclData(userDefinedType mojom_types.UserDefinedType) *mojom_types.DeclarationData {
+        switch u := userDefinedType.(type) {
+        case *mojom_types.UserDefinedTypeEnumType:
+                return u.Value.DeclData
+        case *mojom_types.UserDefinedTypeStructType:
+                return u.Value.DeclData
+        case *mojom_types.UserDefinedTypeUnionType:
+                return u.Value.DeclData
+        case *mojom_types.UserDefinedTypeInterfaceType:
+                return u.Value.DeclData
+        }
+        panic("Non-handled mojom UserDefinedType. This should never happen.")
+}
+
 // userDefinedTypeShortName extracts the ShortName from a user-defined type.
 func userDefinedTypeShortName(userDefinedType mojom_types.UserDefinedType) string {
-        switch u := userDefinedType.(type) {
-        case *mojom_types.UserDefinedTypeEnumType:
-                return *u.Value.DeclData.ShortName
-        case *mojom_types.UserDefinedTypeStructType:
-                return *u.Value.DeclData.ShortName
-        case *mojom_types.UserDefinedTypeUnionType:
-                return *u.Value.DeclData.ShortName
-        case *mojom_types.UserDefinedTypeInterfaceType:
-                return *u.Value.DeclData.ShortName
-        }
-        panic("Non-handled mojom UserDefinedType. This should never happen.")
+        return *userDefinedTypeDeclData(userDefinedType).ShortName
 }
 
 // privateName accepts a string and returns that same string with the first rune
 // set to lowercase.
 func privateName(name string) string {
         _, size := utf8.DecodeRuneInString(name)
         return strings.ToLower(name[:size]) + name[size:]
 }
 
 // formatName formats a name to match go style.
@@ skipping 25 matching lines @@
         }
 
         for i := range parts {
                 part := strings.Title(strings.ToLower(parts[i]))
                 _, size := utf8.DecodeRuneInString(part)
                 parts[i] = strings.ToUpper(part[:size]) + part[size:]
         }
 
         return strings.Join(parts, "")
 }