Adding mojo calls for several lock screen related operations.

ash/login/lock_screen_controller.h

Index: ash/login/lock_screen_controller.h
diff --git a/ash/login/lock_screen_controller.h b/ash/login/lock_screen_controller.h
index 6d01961d483f0df88742e287694a9feb4feb2b0e..88c55a0f8edca2a2e3e3bcb01daf7d844c5fa813 100644
--- a/ash/login/lock_screen_controller.h
+++ b/ash/login/lock_screen_controller.h
@@ -41,6 +41,8 @@ class ASH_EXPORT LockScreenController
                    const base::string16& initial_value) override;
   void LoadUsers(std::unique_ptr<base::ListValue> users,
                  bool show_guest) override;
+  void SetPinEnabledForUser(const AccountId& account_id,
+                            bool is_enabled) override;
 
   // Wrappers around the mojom::LockScreenClient interface.
   // Hash the password and send AuthenticateUser request to LockScreenClient.
@@ -53,6 +55,11 @@ class ASH_EXPORT LockScreenController
   void AttemptUnlock(const AccountId& account_id);
   void HardlockPod(const AccountId& account_id);
   void RecordClickOnLockIcon(const AccountId& account_id);
+  void FocusPod(const AccountId& account_id);
+  void NoPodFocused();
+  void LoadWallpaper(const AccountId& account_id);
+  void SignOutUser();
+  void MaxIncorrectPasswordAttempts(const AccountId& account_id);
 
  private:
   void DoAuthenticateUser(const AccountId& account_id,