Refactors DockedWindowLayoutManager in terms of ash/wm/common

ash/wm/window_animations.cc

Index: ash/wm/window_animations.cc
diff --git a/ash/wm/window_animations.cc b/ash/wm/window_animations.cc
index 6822175846e45907df87612ff670d189df5bd3e1..abb377d8400b77f1766fd687472e94eeb44e2d3d 100644
--- a/ash/wm/window_animations.cc
+++ b/ash/wm/window_animations.cc
@@ -469,9 +469,9 @@ gfx::Rect GetMinimizeAnimationTargetBoundsInScreen(aura::Window* window) {
   if (item_rect.width() != 0 || item_rect.height() != 0) {
     if (shelf->shelf_layout_manager()->visibility_state() == SHELF_AUTO_HIDE) {
       gfx::Rect shelf_bounds = shelf->shelf_widget()->GetWindowBoundsInScreen();
-      if (shelf->alignment() == SHELF_ALIGNMENT_LEFT)
+      if (shelf->alignment() == wm::SHELF_ALIGNMENT_LEFT)
         item_rect.set_x(shelf_bounds.right());
-      else if (shelf->alignment() == SHELF_ALIGNMENT_RIGHT)
+      else if (shelf->alignment() == wm::SHELF_ALIGNMENT_RIGHT)
         item_rect.set_x(shelf_bounds.x());
       else
         item_rect.set_y(shelf_bounds.y());