chromeos: Rename ash::WmShelf to Shelf

ash/wm/panels/panel_window_resizer.cc

Index: ash/wm/panels/panel_window_resizer.cc
diff --git a/ash/wm/panels/panel_window_resizer.cc b/ash/wm/panels/panel_window_resizer.cc
index 1425485cc485804a6ea6be039e5c9dad4d89e7e0..7f517e608c13289b32503e06652f94cb7c4fa586 100644
--- a/ash/wm/panels/panel_window_resizer.cc
+++ b/ash/wm/panels/panel_window_resizer.cc
@@ -7,7 +7,7 @@
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/public/cpp/window_properties.h"
 #include "ash/root_window_controller.h"
-#include "ash/shelf/wm_shelf.h"
+#include "ash/shelf/shelf.h"
 #include "ash/shell.h"
 #include "ash/wm/panels/panel_layout_manager.h"
 #include "ash/wm/window_parenting_utils.h"
@@ -124,7 +124,7 @@ bool PanelWindowResizer::AttachToLauncher(const gfx::Rect& bounds,
     gfx::Rect launcher_bounds =
         panel_layout_manager->shelf()->GetWindow()->GetBoundsInScreen();
     ::wm::ConvertRectFromScreen(GetTarget()->parent(), &launcher_bounds);
-    switch (panel_layout_manager->shelf()->GetAlignment()) {
+    switch (panel_layout_manager->shelf()->alignment()) {
       case SHELF_ALIGNMENT_BOTTOM:
       case SHELF_ALIGNMENT_BOTTOM_LOCKED:
         if (bounds.bottom() >=