Simplify WorkAreaBounds access logic

ash/wm/shelf_layout_manager_unittest.cc

Index: ash/wm/shelf_layout_manager_unittest.cc
diff --git a/ash/wm/shelf_layout_manager_unittest.cc b/ash/wm/shelf_layout_manager_unittest.cc
index 4428c5d548973b09668fe80be503a71f87265b61..4fdfdb2938857ac31b319f5b33e9dff18fa2be57 100644
--- a/ash/wm/shelf_layout_manager_unittest.cc
+++ b/ash/wm/shelf_layout_manager_unittest.cc
@@ -440,12 +440,12 @@ TEST_F(ShelfLayoutManagerTest, SetAutoHideBehavior) {
   shelf->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
   EXPECT_EQ(ShelfLayoutManager::AUTO_HIDE, shelf->visibility_state());
   EXPECT_EQ(display_bounds.bottom() - ShelfLayoutManager::kAutoHideSize,
-            shelf->GetMaximizedWindowBounds(window).bottom());
+            shelf->GetWorkAreaBounds(window).bottom());
 
   shelf->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_NEVER);
   EXPECT_EQ(ShelfLayoutManager::VISIBLE, shelf->visibility_state());
   EXPECT_GT(display_bounds.bottom() - ShelfLayoutManager::kAutoHideSize,
-            shelf->GetMaximizedWindowBounds(window).bottom());
+            shelf->GetWorkAreaBounds(window).bottom());
 
   widget->Maximize();
   EXPECT_EQ(ShelfLayoutManager::VISIBLE, shelf->visibility_state());