Browser tests for the new way of handling device ID in Chrome OS.

chrome/browser/chromeos/login/test/oobe_base_test.cc

Index: chrome/browser/chromeos/login/test/oobe_base_test.cc
diff --git a/chrome/browser/chromeos/login/test/oobe_base_test.cc b/chrome/browser/chromeos/login/test/oobe_base_test.cc
index dd823a8db380989b0e651446038e8f7d09debe52..9db1ab2c266d6abd64017d99723c5eb962542aea 100644
--- a/chrome/browser/chromeos/login/test/oobe_base_test.cc
+++ b/chrome/browser/chromeos/login/test/oobe_base_test.cc
@@ -11,6 +11,7 @@
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
 #include "chrome/browser/chromeos/login/test/https_forwarder.h"
+#include "chrome/browser/chromeos/login/ui/webui_login_view.h"
 #include "chrome/browser/chromeos/net/network_portal_detector_test_impl.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/ui/webui/signin/inline_login_ui.h"
@@ -126,6 +127,9 @@ void OobeBaseTest::SetUpOnMainThread() {
       chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
       content::NotificationService::AllSources()));
 
+  js_checker_.set_web_contents(LoginDisplayHostImpl::default_host()
+                                   ->GetWebUILoginView()
+                                   ->GetWebContents());
   ExtensionApiTest::SetUpOnMainThread();
 }
 
@@ -212,12 +216,7 @@ base::Closure OobeBaseTest::SimulateNetworkPortalClosure() {
 }
 
 void OobeBaseTest::JsExpect(const std::string& expression) {
-  bool result;
-  ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
-      GetLoginUI()->GetWebContents(),
-      "window.domAutomationController.send(!!(" + expression + "));",
-       &result));
-  ASSERT_TRUE(result) << expression;
+  JS().ExpectTrue(expression);
 }
 
 content::WebUI* OobeBaseTest::GetLoginUI() {