Update TermsOfServiceTest.TermsOfServiceScreen test to stop using 'screen' as JS variable name

chrome/browser/chromeos/policy/device_local_account_browsertest.cc

 // Copyright (c) 2013 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 <map>
 #include <string>
 
 #include "apps/app_window_registry.h"
 #include "apps/ui/native_app_window.h"
 #include "ash/shell.h"
@@ skipping 1287 matching lines @@
   // Wait for the Terms of Service to finish downloading, then get the status of
   // the screen's UI elements.
   chromeos::WebUILoginView* web_ui_login_view = host->GetWebUILoginView();
   ASSERT_TRUE(web_ui_login_view);
   content::WebUI* web_ui = web_ui_login_view->GetWebUI();
   ASSERT_TRUE(web_ui);
   content::WebContents* contents = web_ui->GetWebContents();
   ASSERT_TRUE(contents);
   std::string json;
   ASSERT_TRUE(content::ExecuteScriptAndExtractString(contents,
-      "var screen = document.getElementById('terms-of-service');"
+      "var screenElement = document.getElementById('terms-of-service');"
       "function SendReplyIfDownloadDone() {"
-      "  if (screen.classList.contains('tos-loading'))"
+      "  if (screenElement.classList.contains('tos-loading'))"
       "    return false;"
       "  var status = {};"
       "  status.heading = document.getElementById('tos-heading').textContent;"
       "  status.subheading ="
       "      document.getElementById('tos-subheading').textContent;"
       "  status.contentHeading ="
       "      document.getElementById('tos-content-heading').textContent;"
       "  status.content ="
       "      document.getElementById('tos-content-main').textContent;"
-      "  status.error = screen.classList.contains('error');"
+      "  status.error = screenElement.classList.contains('error');"
       "  status.acceptEnabled ="
       "      !document.getElementById('tos-accept-button').disabled;"
       "  domAutomationController.send(JSON.stringify(status));"
       "  observer.disconnect();"
       "  return true;"
       "}"
       "var observer = new MutationObserver(SendReplyIfDownloadDone);"
       "if (!SendReplyIfDownloadDone()) {"
       "  var options = { attributes: true, attributeFilter: [ 'class' ] };"
-      "  observer.observe(screen, options);"
+      "  observer.observe(screenElement, options);"
       "}",
       &json));
   scoped_ptr<base::Value> value_ptr(base::JSONReader::Read(json));
   const base::DictionaryValue* status = NULL;
   ASSERT_TRUE(value_ptr.get());
   ASSERT_TRUE(value_ptr->GetAsDictionary(&status));
   std::string heading;
   EXPECT_TRUE(status->GetString("heading", &heading));
   std::string subheading;
   EXPECT_TRUE(status->GetString("subheading", &subheading));
@@ skipping 47 matching lines @@
   if (!IsSessionStarted()) {
     content::WindowedNotificationObserver(chrome::NOTIFICATION_SESSION_STARTED,
                                           base::Bind(IsSessionStarted)).Wait();
   }
 }
 
 INSTANTIATE_TEST_CASE_P(TermsOfServiceTestInstance,
                         TermsOfServiceTest, testing::Bool());
 
 }  // namespace policy