base: Add three helper functions to Values API.

chrome/test/webdriver/session.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/test/webdriver/session.h"
 
 #include <sstream>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 1172 matching lines @@
     if (error_msg.empty())
       error_msg = "Script failed with error code: " + base::IntToString(code);
     return new Error(code, error_msg);
   }
 
   Value* tmp;
   if (result_dict->Get("value", &tmp)) {
     *script_result= tmp->DeepCopy();
   } else {
     // "value" was not defined in the returned dictionary; set to null.
-    *script_result= Value::CreateNullValue();
+    *script_result= base::NullValue();
   }
   return NULL;
 }
 
 void Session::SendKeysOnSessionThread(const string16& keys, Error** error) {
   std::vector<WebKeyEvent> key_events;
   std::string error_msg;
   if (!ConvertKeysToWebKeyEvents(keys, &key_events, &error_msg)) {
     *error = new Error(kUnknownError, error_msg);
     return;
@@ skipping 312 matching lines @@
   if (error)
     return error;
   if (!value->GetAsInteger(status))
     return new Error(kUnknownError,
                      "GET_APPCACHE_STATUS script returned non-integer: " +
                      JsonStringify(value.get()));
   return NULL;
 }
 
 }  // namespace webdriver