Remove base::Value::CreateNullValue

extensions/renderer/api_signature.cc

 // Copyright 2016 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 "extensions/renderer/api_signature.h"
 
 #include <algorithm>
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
@@ skipping 114 matching lines @@
       const APITypeReferenceMap& type_refs,
       std::string* error,
       base::ListValue* list_value)
       : ArgumentParser(context, signature, arguments, type_refs, error),
         list_value_(list_value) {}
 
   v8::Local<v8::Function> callback() { return callback_; }
 
  private:
   void AddNull() override {
-    list_value_->Append(base::Value::CreateNullValue());
+    list_value_->Append(base::MakeUnique<base::Value>());
   }
   void AddNullCallback() override {
     // The base::Value conversion doesn't include the callback directly, so we
     // don't add a null parameter here.
   }
   std::unique_ptr<base::Value>* GetBuffer() override { return &last_arg_; }
   void AddParsedArgument(v8::Local<v8::Value> value) override {
     // The corresponding base::Value is expected to have been stored in
     // |last_arg_| already.
     DCHECK(last_arg_);
@@ skipping 166 matching lines @@
       return false;
     json->Append(std::move(converted));
   }
 
   *json_out = std::move(json);
   *callback_out = callback;
   return true;
 }
 
 }  // namespace extensions