base: Add three helper functions to Values API.

content/renderer/render_view.cc

 // Copyright (c) 2011 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 "content/renderer/render_view.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 3466 matching lines @@
     ListValue list;
     if (!result.IsEmpty() && web_frame) {
       v8::HandleScope handle_scope;
       v8::Local<v8::Context> context = web_frame->mainWorldScriptContext();
       v8::Context::Scope context_scope(context);
       V8ValueConverter converter;
       converter.set_allow_date(true);
       converter.set_allow_regexp(true);
       list.Set(0, converter.FromV8Value(result, context));
     } else {
-      list.Set(0, Value::CreateNullValue());
+      list.Set(0, base::NullValue());
     }
     Send(new ViewHostMsg_ScriptEvalResponse(routing_id_, id, list));
   }
 }
 
 void RenderView::OnScriptEvalRequest(const string16& frame_xpath,
                                      const string16& jscript,
                                      int id,
                                      bool notify_result) {
   EvaluateScript(frame_xpath, jscript, id, notify_result);
@@ skipping 1031 matching lines @@
 }
 #endif
 
 void RenderView::OnContextMenuClosed(
     const webkit_glue::CustomContextMenuContext& custom_context) {
   if (custom_context.is_pepper_menu)
     pepper_delegate_.OnContextMenuClosed(custom_context);
   else
     context_menu_node_.reset();
 }