Converts most of WorkspaceLayoutManager tests to use common code

ash/test/test_session_state_delegate.h

 // Copyright (c) 2013 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 ASH_TEST_TEST_SESSION_STATE_DELEGATE_H_
 #define ASH_TEST_TEST_SESSION_STATE_DELEGATE_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 52 matching lines @@
 
   // Updates the internal state that indicates whether the session has been
   // fully started for the active user. If |active_user_session_started| is
   // |true|, |has_active_user_| is set to |true| as well (see below for the
   // difference between these two flags).
   void SetActiveUserSessionStarted(bool active_user_session_started);
 
   // Updates the internal state that indicates whether the screen can be locked.
   // Locking will only actually be allowed when this value is |true| and there
   // is an active user.
-  void SetCanLockScreen(bool can_lock_screen);
+  static void SetCanLockScreen(bool can_lock_screen);
 
   // Updates |should_lock_screen_before_suspending_|.
   void SetShouldLockScreenBeforeSuspending(bool should_lock);
 
   // Updates the internal state that indicates whether user adding screen is
   // running now.
   void SetUserAddingScreenRunning(bool user_adding_screen_running);
 
   // Setting non NULL image enables avatar icon.
   void SetUserImage(const gfx::ImageSkia& user_image);
@@ skipping 29 matching lines @@
   // before the profile and browser UI are available.
   SessionState session_state_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSessionStateDelegate);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_TEST_SESSION_STATE_DELEGATE_H_