cros: Cleanup lock screen and OOBE C++ backing code.

chrome/browser/chromeos/login/lock/screen_locker.h

Index: chrome/browser/chromeos/login/lock/screen_locker.h
diff --git a/chrome/browser/chromeos/login/lock/screen_locker.h b/chrome/browser/chromeos/login/lock/screen_locker.h
index 89ef5dde31bd5726f0f64f9222b7b3adde193eea..86ce419bcaed1a525182ba52e7569405478a507f 100644
--- a/chrome/browser/chromeos/login/lock/screen_locker.h
+++ b/chrome/browser/chromeos/login/lock/screen_locker.h
@@ -15,7 +15,6 @@
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
-#include "chrome/browser/chromeos/login/lock/screen_locker_delegate.h"
 #include "chrome/browser/chromeos/login/ui/login_display.h"
 #include "chromeos/login/auth/auth_status_consumer.h"
 #include "chromeos/login/auth/user_context.h"
@@ -37,6 +36,7 @@ class Authenticator;
 class ExtendedAuthenticator;
 class AuthFailure;
 class ScreenlockIconProvider;
+class WebUIScreenLocker;
 
 namespace test {
 class ScreenLockerTester;
@@ -44,7 +44,7 @@ class ScreenLockerViewsTester;
 class WebUIScreenLockerTester;
 }  // namespace test
 
-// ScreenLocker creates a ScreenLockerDelegate which will display the lock UI.
+// ScreenLocker creates a WebUIScreenLocker which will display the lock UI.
 // As well, it takes care of authenticating the user and managing a global
 // instance of itself which will be deleted when the system is unlocked.
 class ScreenLocker : public AuthStatusConsumer {
@@ -92,8 +92,8 @@ class ScreenLocker : public AuthStatusConsumer {
                         HelpAppLauncher::HelpTopic help_topic_id,
                         bool sign_out_only);
 
-  // Returns the screen locker's delegate.
-  ScreenLockerDelegate* delegate() const { return delegate_.get(); }
+  // Returns the WebUIScreenLocker used to lock the screen.
+  WebUIScreenLocker* web_ui() { return web_ui_.get(); }
 
   // Returns the users to authenticate.
   const user_manager::UserList& users() const { return users_; }
@@ -102,10 +102,6 @@ class ScreenLocker : public AuthStatusConsumer {
   // the same login events that ScreenLocker does.
   void SetLoginStatusConsumer(chromeos::AuthStatusConsumer* consumer);
 
-  // Returns WebUI associated with screen locker implementation or NULL if
-  // there isn't one.
-  content::WebUI* GetAssociatedWebUI();
-
   // Initialize or uninitialize the ScreenLocker class. It listens to
   // NOTIFICATION_SESSION_STARTED so that the screen locker accepts lock
   // requests only after a user has logged in.
@@ -129,7 +125,7 @@ class ScreenLocker : public AuthStatusConsumer {
   friend class test::ScreenLockerTester;
   friend class test::ScreenLockerViewsTester;
   friend class test::WebUIScreenLockerTester;
-  friend class ScreenLockerDelegate;
+  friend class WebUIScreenLocker;
 
   // Track whether the user used pin or password to unlock the lock screen.
   // Values corrospond to UMA histograms, do not modify, or add or delete other
@@ -157,8 +153,8 @@ class ScreenLocker : public AuthStatusConsumer {
   // Looks up user in unlock user list.
   const user_manager::User* FindUnlockUser(const AccountId& account_id);
 
-  // ScreenLockerDelegate instance in use.
-  std::unique_ptr<ScreenLockerDelegate> delegate_;
+  // WebUIScreenLocker instance in use.
+  std::unique_ptr<WebUIScreenLocker> web_ui_;
 
   // Users that can unlock the device.
   user_manager::UserList users_;