[cros] Rename BaseLoginDisplayHost to LoginDisplayHostImpl

chrome/browser/chromeos/login/login_display_host.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_DISPLAY_HOST_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_DISPLAY_HOST_H_
 
 #include <string>
 
 #include "base/values.h"
 #include "chrome/browser/chromeos/customization_document.h"
 #include "chrome/browser/chromeos/login/login_display.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace views {
 class Widget;
 }  // namespace views
 
 namespace chromeos {
 
 class WizardController;
 
 // An interface that defines OOBE/login screen host.
-// Host encapsulates implementation specific background window (views/WebUI),
-// OOBE/login controllers, views/WebUI UI implementation (such as LoginDisplay).
+// Host encapsulates WebUI window OOBE/login controllers,
+// UI implementation (such as LoginDisplay).
 class LoginDisplayHost {
  public:
   virtual ~LoginDisplayHost() {}
 
   // Creates UI implementation specific login display instance (views/WebUI).
   // The caller takes ownership of the returned value.
   virtual LoginDisplay* CreateLoginDisplay(
       LoginDisplay::Delegate* delegate) = 0;
 
   // Returns corresponding native window.
@@ skipping 46 matching lines @@
   // Resumes a previously started sign in screen.
   virtual void ResumeSignInScreen() = 0;
 
   // Invoked when system preferences that affect the signin screen have changed.
   virtual void OnPreferencesChanged() = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_DISPLAY_HOST_H_