Rewrite simple uses of base::ListValue::Append() taking a raw pointer var.

tools/json_schema_compiler/test/additional_properties_unittest.cc

Index: tools/json_schema_compiler/test/additional_properties_unittest.cc
diff --git a/tools/json_schema_compiler/test/additional_properties_unittest.cc b/tools/json_schema_compiler/test/additional_properties_unittest.cc
index 1d1750ab3b87e3175f49cbc16518d9fb9e1ff14f..4e2476b0e002f00529f327b532b42e07b648fdf8 100644
--- a/tools/json_schema_compiler/test/additional_properties_unittest.cc
+++ b/tools/json_schema_compiler/test/additional_properties_unittest.cc
@@ -5,6 +5,7 @@
 #include "tools/json_schema_compiler/test/additional_properties.h"
 
 #include <memory>
+#include <utility>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -59,10 +60,10 @@ TEST(JsonSchemaCompilerAdditionalPropertiesTest,
 
   base::ListValue expected;
   {
-    base::DictionaryValue* dict = new base::DictionaryValue();
+    std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
     dict->SetInteger("integer", 5);
     dict->SetString("key", "value");
-    expected.Append(dict);
+    expected.Append(std::move(dict));
   }
 
   EXPECT_TRUE(base::Value::Equals(