Migrate call sites LoginDisplayHostImpl::default_host to LoginDisplayHost.

chrome/browser/chromeos/login/enable_debugging_browsertest.cc

 // Copyright 2014 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 <string>
 
 #include "base/command_line.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/test/oobe_screen_waiter.h"
-#include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
+#include "chrome/browser/chromeos/login/ui/login_display_host.h"
 #include "chrome/browser/chromeos/login/ui/oobe_display.h"
 #include "chrome/browser/chromeos/login/ui/webui_login_view.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/fake_debug_daemon_client.h"
 #include "chromeos/dbus/fake_power_manager_client.h"
@@ skipping 160 matching lines @@
         scoped_ptr<DebugDaemonClient>(debug_daemon_client_));
 
     LoginManagerTest::SetUpInProcessBrowserTestFixture();
   }
 
   bool JSExecuted(const std::string& script) {
     return content::ExecuteScript(web_contents(), script);
   }
 
   void WaitUntilJSIsReady() {
-    LoginDisplayHostImpl* host = static_cast<LoginDisplayHostImpl*>(
-        LoginDisplayHostImpl::default_host());
+    LoginDisplayHost* host = LoginDisplayHost::default_host();
     if (!host)
       return;
     chromeos::OobeUI* oobe_ui = host->GetOobeUI();
     if (!oobe_ui)
       return;
     base::RunLoop run_loop;
     const bool oobe_ui_ready = oobe_ui->IsJSReady(run_loop.QuitClosure());
     if (!oobe_ui_ready)
       run_loop.Run();
   }
@@ skipping 201 matching lines @@
 }
 
 // Canceling auto shown setup screen should close it.
 IN_PROC_BROWSER_TEST_F(EnableDebuggingRequestedTest, CancelAutoShowSetup) {
   OobeScreenWaiter(OobeDisplay::SCREEN_OOBE_ENABLE_DEBUGGING).Wait();
   CloseEnableDebuggingScreen();
   JSExpect("!!document.querySelector('#debugging.hidden')");
 }
 
 }  // namespace chromeos