base: Add three helper functions to Values API.

chrome/browser/ui/webui/options/certificate_manager_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/certificate_manager_handler.h"
 
 #include "base/file_util.h"  // for FileAccessProvider
 #include "base/memory/scoped_vector.h"
 #include "base/safe_strerror_posix.h"
 #include "base/string_number_conversions.h"
@@ skipping 935 matching lines @@
     web_ui_->CallJavascriptFunction("CertificateManager.onPopulateTree", args);
   }
 }
 
 void CertificateManagerHandler::ShowError(const std::string& title,
                                           const std::string& error) const {
   ScopedVector<const Value> args;
   args.push_back(Value::CreateStringValue(title));
   args.push_back(Value::CreateStringValue(error));
   args.push_back(Value::CreateStringValue(l10n_util::GetStringUTF8(IDS_OK)));
-  args.push_back(Value::CreateNullValue());  // cancelTitle
-  args.push_back(Value::CreateNullValue());  // okCallback
-  args.push_back(Value::CreateNullValue());  // cancelCallback
+  args.push_back(base::NullValue());  // cancelTitle
+  args.push_back(base::NullValue());  // okCallback
+  args.push_back(base::NullValue());  // cancelCallback
   web_ui_->CallJavascriptFunction("AlertOverlay.show", args.get());
 }
 
 void CertificateManagerHandler::ShowImportErrors(
     const std::string& title,
     const net::CertDatabase::ImportCertFailureList& not_imported) const {
   std::string error;
   if (selected_cert_list_.size() == 1)
     error = l10n_util::GetStringUTF8(
         IDS_CERT_MANAGER_IMPORT_SINGLE_NOT_IMPORTED);
@@ skipping 27 matching lines @@
   // TODO(xiyuan): Use async way when underlying supports it.
   base::FundamentalValue ready(cryptohome->Pkcs11IsTpmTokenReady());
   web_ui_->CallJavascriptFunction("CertificateManager.onCheckTpmTokenReady",
                                   ready);
 }
 #endif
 
 gfx::NativeWindow CertificateManagerHandler::GetParentWindow() const {
   return web_ui_->tab_contents()->view()->GetTopLevelNativeWindow();
 }