Cleanup ash shelf accessor functions.

ash/shelf/shelf_layout_manager_unittest.cc

Index: ash/shelf/shelf_layout_manager_unittest.cc
diff --git a/ash/shelf/shelf_layout_manager_unittest.cc b/ash/shelf/shelf_layout_manager_unittest.cc
index d2991be6de3c290bb0b90db7f06353a9dfcf5b0d..d70cfd1894571919f6b8d76ef5952677fd1eaae4 100644
--- a/ash/shelf/shelf_layout_manager_unittest.cc
+++ b/ash/shelf/shelf_layout_manager_unittest.cc
@@ -180,11 +180,9 @@ class ShelfDragCallback {
         scroll_.y(),
         scroll_.x());
     bool increasing_drag =
-        GetShelfLayoutManager()->SelectValueForShelfAlignment(
-            scroll_delta < 0,
-            scroll_delta > 0,
-            scroll_delta < 0,
-            scroll_delta > 0);
+        GetShelfWidget()->shelf()->SelectValueForShelfAlignment(
+            scroll_delta < 0, scroll_delta > 0,
+            scroll_delta < 0, scroll_delta > 0);
     int shelf_size = GetShelfLayoutManager()->PrimaryAxisValue(
         shelf_bounds.height(),
         shelf_bounds.width());