Added ToJson to JSON schema compiler.

tools/json_schema_compiler/test/objects_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "tools/json_schema_compiler/test/objects.h"
 
+#include "base/json/json_writer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using namespace test::api::objects;
 
 TEST(JsonSchemaCompilerObjectsTest, ObjectParamParamsCreate) {
   {
     scoped_ptr<ListValue> strings(new ListValue());
     strings->Append(Value::CreateStringValue("one"));
     strings->Append(Value::CreateStringValue("two"));
     scoped_ptr<DictionaryValue> info_value(new DictionaryValue());
@@ skipping 43 matching lines @@
 TEST(JsonSchemaCompilerObjectsTest, OnObjectFiredCreate) {
   OnObjectFired::SomeObject object;
   object.state = OnObjectFired::SomeObject::STATE_BAR;
   scoped_ptr<ListValue> results(OnObjectFired::Create(object));
 
   DictionaryValue expected;
   expected.SetString("state", "bar");
   DictionaryValue* result = NULL;
   ASSERT_TRUE(results->GetDictionary(0, &result));
   ASSERT_TRUE(result->Equals(&expected));
+
+  std::string json1 = OnObjectFired::ToJson(object);
+  std::string json2;
+  base::JSONWriter::Write(results.get(), &json2);
+  ASSERT_EQ(json1, json2);
 }