ash: Fix variable names and setters in ShelfLayoutManager and tests

ash/wm/panels/panel_window_resizer_unittest.cc

Index: ash/wm/panels/panel_window_resizer_unittest.cc
diff --git a/ash/wm/panels/panel_window_resizer_unittest.cc b/ash/wm/panels/panel_window_resizer_unittest.cc
index cb02a79885b1ab2652a0bccf864d3db23a2aad55..fe5449a83d6dc6315c16bdbc22ead6707b322ba3 100644
--- a/ash/wm/panels/panel_window_resizer_unittest.cc
+++ b/ash/wm/panels/panel_window_resizer_unittest.cc
@@ -268,12 +268,9 @@ TEST_F(PanelWindowResizerTest, DetachThenHideShelf) {
 
   // Hide the shelf. This minimizes all attached windows but should ignore
   // the dragged window.
-  ShelfLayoutManager* layout_manager =
-      RootWindowController::ForWindow(window.get())
-          ->shelf_widget()
-          ->shelf_layout_manager();
-  layout_manager->SetAutoHideBehavior(SHELF_AUTO_HIDE_ALWAYS_HIDDEN);
-  layout_manager->UpdateVisibilityState();
+  Shelf* shelf = RootWindowController::ForWindow(window.get())->GetShelf();
+  shelf->SetAutoHideBehavior(SHELF_AUTO_HIDE_ALWAYS_HIDDEN);
+  shelf->shelf_layout_manager()->UpdateVisibilityState();
   RunAllPendingInMessageLoop();
   EXPECT_FALSE(state->IsMinimized());
   EXPECT_EQ(kShellWindowId_PanelContainer, window->parent()->id());