ash: Fix variable names and setters in ShelfLayoutManager and tests

ash/shelf/shelf_tooltip_manager_unittest.cc

Index: ash/shelf/shelf_tooltip_manager_unittest.cc
diff --git a/ash/shelf/shelf_tooltip_manager_unittest.cc b/ash/shelf/shelf_tooltip_manager_unittest.cc
index 72dcaced973866571a5e23b78ca9796f8c7817cc..b3df6ed1081273f80ce900cfe0d077eca10cadb7 100644
--- a/ash/shelf/shelf_tooltip_manager_unittest.cc
+++ b/ash/shelf/shelf_tooltip_manager_unittest.cc
@@ -122,10 +122,9 @@ TEST_F(ShelfTooltipManagerTest, HideWhenShelfIsAutoHide) {
   ShowImmediately();
   ASSERT_TRUE(TooltipIsVisible());
 
-  ShelfLayoutManager* shelf_layout_manager = shelf_->shelf_layout_manager();
-  shelf_layout_manager->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
-  shelf_layout_manager->UpdateAutoHideState();
-  ASSERT_EQ(SHELF_AUTO_HIDE_HIDDEN, shelf_layout_manager->auto_hide_state());
+  shelf_->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
+  shelf_->shelf_layout_manager()->UpdateAutoHideState();
+  ASSERT_EQ(SHELF_AUTO_HIDE_HIDDEN, shelf_->GetAutoHideState());
 
   // Tooltip visibility change for auto hide may take time.
   EXPECT_TRUE(TooltipIsVisible());