chromeos: Rename ash::WmShelf to Shelf

ash/wm/immersive_fullscreen_controller_unittest.cc

Index: ash/wm/immersive_fullscreen_controller_unittest.cc
diff --git a/ash/wm/immersive_fullscreen_controller_unittest.cc b/ash/wm/immersive_fullscreen_controller_unittest.cc
index 52955a02dec24ccc71f1442cfd0c9fb01b91629e..808c393876d42e6f9f7c4598aa647b638da3c9db 100644
--- a/ash/wm/immersive_fullscreen_controller_unittest.cc
+++ b/ash/wm/immersive_fullscreen_controller_unittest.cc
@@ -8,7 +8,7 @@
 #include "ash/public/cpp/shelf_types.h"
 #include "ash/root_window_controller.h"
 #include "ash/shared/immersive_fullscreen_controller_delegate.h"
-#include "ash/shelf/wm_shelf.h"
+#include "ash/shelf/shelf.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/immersive_fullscreen_controller_test_api.h"
@@ -1051,7 +1051,7 @@ TEST_F(ImmersiveFullscreenControllerTest, Bubbles) {
 // immersive fullscreen and that the shelf's state before entering immersive
 // fullscreen is restored upon exiting immersive fullscreen.
 TEST_F(ImmersiveFullscreenControllerTest, Shelf) {
-  WmShelf* shelf = GetPrimaryShelf();
+  Shelf* shelf = GetPrimaryShelf();
 
   // Shelf is visible by default.
   window()->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);