Converts most of WorkspaceLayoutManager tests to use common code

ash/common/wm/default_state.cc

 // Copyright 2014 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.
 
 #include "ash/common/wm/default_state.h"
 
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/dock/docked_window_layout_manager.h"
 #include "ash/common/wm/window_animation_types.h"
 #include "ash/common/wm/window_parenting_utils.h"
@@ skipping 717 matching lines @@
     window->SetVisibilityAnimationType(
         WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE);
 
     // Hide the window.
     window->Hide();
     // Activate another window.
     if (window_state->IsActive())
       window_state->Deactivate();
   } else if ((window->GetTargetVisibility() ||
               IsMinimizedWindowState(previous_state_type)) &&
-             !window->GetLayer()->visible()) {
+             !window->GetLayerVisible()) {
     // The layer may be hidden if the window was previously minimized. Make
     // sure it's visible.
     window->Show();
     if (IsMinimizedWindowState(previous_state_type) &&
         !window_state->IsMaximizedOrFullscreenOrPinned()) {
       window_state->set_unminimize_to_restore_bounds(false);
     }
   }
 }
 
@@ skipping 14 matching lines @@
     gfx::Rect center_in_parent = GetDisplayWorkAreaBoundsInParent(window);
     center_in_parent.ClampToCenteredSize(window->GetBounds().size());
     window_state->SetBoundsDirectAnimated(center_in_parent);
   }
   // Centering window is treated as if a user moved and resized the window.
   window_state->set_bounds_changed_by_user(true);
 }
 
 }  // namespace wm
 }  // namespace ash