Remove base::Value::CreateNullValue

chrome/test/chromedriver/chrome/web_view_impl.cc

Index: chrome/test/chromedriver/chrome/web_view_impl.cc
diff --git a/chrome/test/chromedriver/chrome/web_view_impl.cc b/chrome/test/chromedriver/chrome/web_view_impl.cc
index c55d72256256000c31a2f3af083e772065a3b9d7..219427c8c83ce23a04401b608108025e0640cc6e 100644
--- a/chrome/test/chromedriver/chrome/web_view_impl.cc
+++ b/chrome/test/chromedriver/chrome/web_view_impl.cc
@@ -11,6 +11,7 @@
 #include "base/files/file_path.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/platform_thread.h"
@@ -834,7 +835,7 @@ Status EvaluateScriptAndGetValue(DevToolsClient* client,
     return Status(kUnknownError, "Runtime.evaluate missing string 'type'");
 
   if (type == "undefined") {
-    *result = base::Value::CreateNullValue();
+    *result = base::MakeUnique<base::Value>();
   } else {
     base::Value* value;
     if (!temp_result->Get("value", &value))