chromeos: Remove old LockScreen signal.

chromeos/dbus/session_manager_client.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 CHROMEOS_DBUS_SESSION_MANAGER_CLIENT_H_
 #define CHROMEOS_DBUS_SESSION_MANAGER_CLIENT_H_
 
 #include <map>
 #include <string>
 
@@ skipping 10 matching lines @@
  public:
   // Interface for observing changes from the session manager.
   class Observer {
    public:
     // Called when the owner key is set.
     virtual void OwnerKeySet(bool success) {}
 
     // Called when the property change is complete.
     virtual void PropertyChangeComplete(bool success) {}
 
-    // Called when the session manager requests that the lock screen be
-    // displayed.  NotifyLockScreenShown() is called after the lock screen
-    // is shown (the canonical "is the screen locked?" state lives in the
-    // session manager).
-    // TODO(derat): Delete this once the session manager is calling the
-    // "LockScreen" method instead.
-    virtual void LockScreen() {}
-
     // Called when the session manager announces that the screen has been locked
     // successfully (i.e. after NotifyLockScreenShown() has been called).
     virtual void ScreenIsLocked() {}
 
     // Called when the session manager announces that the screen has been
     // unlocked successfully (i.e. after NotifyLockScreenDismissed() has
     // been called).
     virtual void ScreenIsUnlocked() {}
 
     // Called after EmitLoginPromptVisible is called.
@@ skipping 120 matching lines @@
   // Create() should be used instead.
   SessionManagerClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SessionManagerClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_SESSION_MANAGER_CLIENT_H_