Remove base::Value::CreateNullValue

tools/json_schema_compiler/test/error_generation_unittest.cc

 // Copyright 2013 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/error_generation.h"
 
 #include "base/json/json_writer.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 82 matching lines @@
 
 // GenerateFunctionParamsCreate errors
 
 TEST(JsonSchemaCompilerErrorTest, ParamIsRequired) {
   {
     std::unique_ptr<base::ListValue> params_value = List(new Value(5));
     base::string16 error;
     EXPECT_TRUE(TestFunction::Params::Create(*params_value, &error));
   }
   {
-    std::unique_ptr<base::ListValue> params_value =
-        List(base::Value::CreateNullValue().release());
+    std::unique_ptr<base::ListValue> params_value = List(new Value());
     base::string16 error;
     EXPECT_FALSE(TestFunction::Params::Create(*params_value, &error));
     EXPECT_TRUE(EqualsUtf16("'num' is required", error));
   }
 }
 
 // GeneratePopulateVariableFromValue errors
 
 TEST(JsonSchemaCompilerErrorTest, WrongPropertyValueType) {
   {
@@ skipping 207 matching lines @@
     EXPECT_TRUE(EqualsUtf16("", GetPopulateError<TestType>(*value)));
   }
   {
     std::unique_ptr<base::DictionaryValue> value =
         Dictionary("string", new base::Value("yes"), "ohno",
                    new base::Value("many values"));
     EXPECT_TRUE(EqualsUtf16("found unexpected key 'ohno'",
         GetPopulateError<TestType>(*value)));
   }
 }