Mojom Parser: Populate |serialized_runimte_type_info| field during serialization.

mojom/mojom_parser/parser/resolution_test.go

 // Copyright 2015 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 parser
 
 import (
         "fmt"
         "mojom/mojom_parser/mojom"
         "strings"
@@ skipping 1227 matching lines @@
                 struct Struct2{};
 
                 interface Interface1 {
                         const Color FAVORITE_COLOR = RED;
 
                         Foo(int32 x) => (string y);
                 };
 
                 interface Interface2 {
                         Foo(int32 x) => (Struct1 y);
+                        Bar(string x);
                 };
                 `
 
                 test.addTestCase(contents,
                         "Interface1",
                         []string{"Interface1", "Color"},
                 )
 
                 test.addTestCase(contents,
                         "Interface2",
@@ skipping 127 matching lines @@
                         typeKey = mojom.ComputeTypeKey(t)
                 }
                 userDefinedType := descriptor.TypesByKey[typeKey]
                 if userDefinedType == nil {
                         panic(fmt.Sprintf("No type found for: %s", t))
                 }
                 typeSet.Add(userDefinedType)
         }
         return typeSet
 }