[ChromeOS] WebUI OOBE/Login refactoring.

chrome/browser/ui/webui/chromeos/login/base_screen_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/chromeos/login/base_screen_handler.h"
+
+#include "base/values.h"
+
+namespace chromeos {
+
+BaseScreenHandler::BaseScreenHandler() : page_is_ready_(false) {
+}
+
+BaseScreenHandler::~BaseScreenHandler() {
+}
+
+void BaseScreenHandler::InitializeBase() {
+  page_is_ready_ = true;
+  Initialize();
+}
+
+void BaseScreenHandler::ShowScreen(const char* screen_name,
+                                   const char* data) {
+  DictionaryValue screen_params;
+  screen_params.SetString("id", screen_name);
+  if (data)
+    screen_params.SetString("data", data);
+  web_ui_->CallJavascriptFunction("cr.ui.Oobe.showScreen", screen_params);
+}
+
+}  // namespace chromeos