base: Add three helper functions to Values API.

chrome/browser/ui/webui/options/cookies_view_handler.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 "chrome/browser/ui/webui/options/cookies_view_handler.h"
 
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browsing_data_appcache_helper.h"
 #include "chrome/browser/browsing_data_cookie_helper.h"
@@ skipping 84 matching lines @@
     return;
 
   CookieTreeNode* parent_node = cookies_tree_model_->AsNode(parent);
 
   ListValue* children = new ListValue;
   cookies_tree_model_util::GetChildNodeList(parent_node, start, count,
                                             children);
 
   ListValue args;
   args.Append(parent == cookies_tree_model_->GetRoot() ?
-      Value::CreateNullValue() :
+      base::NullValue() :
       Value::CreateStringValue(
           cookies_tree_model_util::GetTreeNodeId(parent_node)));
   args.Append(Value::CreateIntegerValue(start));
   args.Append(children);
   web_ui_->CallJavascriptFunction("CookiesView.onTreeItemAdded", args);
 }
 
 void CookiesViewHandler::TreeNodesRemoved(ui::TreeModel* model,
                                           ui::TreeModelNode* parent,
                                           int start,
                                           int count) {
   // Skip if there is a batch update in progress.
   if (batch_update_)
     return;
 
   ListValue args;
   args.Append(parent == cookies_tree_model_->GetRoot() ?
-      Value::CreateNullValue() :
+      base::NullValue() :
       Value::CreateStringValue(cookies_tree_model_util::GetTreeNodeId(
           cookies_tree_model_->AsNode(parent))));
   args.Append(Value::CreateIntegerValue(start));
   args.Append(Value::CreateIntegerValue(count));
   web_ui_->CallJavascriptFunction("CookiesView.onTreeItemRemoved", args);
 }
 
 void CookiesViewHandler::TreeModelBeginBatch(CookiesTreeModel* model) {
   DCHECK(!batch_update_);  // There should be no nested batch begin.
   batch_update_ = true;
@@ skipping 67 matching lines @@
     SendChildren(node);
 }
 
 void CookiesViewHandler::SendChildren(CookieTreeNode* parent) {
   ListValue* children = new ListValue;
   cookies_tree_model_util::GetChildNodeList(parent, 0, parent->child_count(),
       children);
 
   ListValue args;
   args.Append(parent == cookies_tree_model_->GetRoot() ?
-      Value::CreateNullValue() :
+      base::NullValue() :
       Value::CreateStringValue(cookies_tree_model_util::GetTreeNodeId(parent)));
   args.Append(children);
 
   web_ui_->CallJavascriptFunction("CookiesView.loadChildren", args);
 }