json_schema_compiler: Don't use deprecated ListValue::Append(Value*) overload.

tools/json_schema_compiler/test/idl_schemas_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 <memory>
 #include <utility>
 
+#include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/json_schema_compiler/test/idl_basics.h"
 #include "tools/json_schema_compiler/test/idl_object_types.h"
 
 using test::api::idl_basics::MyType1;
 using test::api::idl_object_types::BarType;
 using test::api::idl_object_types::FooType;
 
 namespace Function2 = test::api::idl_basics::Function2;
@@ skipping 104 matching lines @@
   MyType1* t1 = f9_params->arg.get();
   EXPECT_EQ(17, t1->x);
   EXPECT_EQ("hello", t1->y);
 }
 
 TEST(IdlCompiler, ArrayTypes) {
   // Tests of a function that takes an integer and an array of integers. First
   // use an empty array.
   base::ListValue list;
   list.AppendInteger(33);
-  list.Append(new base::ListValue);
+  list.Append(base::MakeUnique<base::ListValue>());
   std::unique_ptr<Function10::Params> f10_params =
       Function10::Params::Create(list);
   ASSERT_TRUE(f10_params != NULL);
   EXPECT_EQ(33, f10_params->x);
   EXPECT_TRUE(f10_params->y.empty());
 
   // Same function, but this time with 2 values in the array.
   list.Clear();
   list.AppendInteger(33);
   std::unique_ptr<base::ListValue> sublist(new base::ListValue);
@@ skipping 57 matching lines @@
                                                       &icon));
   base::ListValue list;
   list.Append(std::move(icon_props));
   std::unique_ptr<ObjectFunction1::Params> params =
       ObjectFunction1::Params::Create(list);
   ASSERT_TRUE(params.get() != NULL);
   std::string tmp;
   EXPECT_TRUE(params->icon.additional_properties.GetString("hello", &tmp));
   EXPECT_EQ("world", tmp);
 }