ash: Convert ShelfDelegate to use WmShelf* instead of Shelf*

ash/test/test_shelf_delegate.cc

Index: ash/test/test_shelf_delegate.cc
diff --git a/ash/test/test_shelf_delegate.cc b/ash/test/test_shelf_delegate.cc
index 8f836d991a9e7139322334807d17b3505bedd0a2..71e9538f1757a9441763e6e41b6595e233803453 100644
--- a/ash/test/test_shelf_delegate.cc
+++ b/ash/test/test_shelf_delegate.cc
@@ -85,17 +85,17 @@ void TestShelfDelegate::OnWindowHierarchyChanging(
     RemoveShelfItemForWindow(params.target);
 }
 
-void TestShelfDelegate::OnShelfCreated(Shelf* shelf) {}
+void TestShelfDelegate::OnShelfCreated(WmShelf* shelf) {}
 
-void TestShelfDelegate::OnShelfDestroyed(Shelf* shelf) {}
+void TestShelfDelegate::OnShelfDestroyed(WmShelf* shelf) {}
 
-void TestShelfDelegate::OnShelfAlignmentChanged(Shelf* shelf) {}
+void TestShelfDelegate::OnShelfAlignmentChanged(WmShelf* shelf) {}
 
-void TestShelfDelegate::OnShelfAutoHideBehaviorChanged(Shelf* shelf) {}
+void TestShelfDelegate::OnShelfAutoHideBehaviorChanged(WmShelf* shelf) {}
 
-void TestShelfDelegate::OnShelfAutoHideStateChanged(Shelf* shelf) {}
+void TestShelfDelegate::OnShelfAutoHideStateChanged(WmShelf* shelf) {}
 
-void TestShelfDelegate::OnShelfVisibilityStateChanged(Shelf* shelf) {}
+void TestShelfDelegate::OnShelfVisibilityStateChanged(WmShelf* shelf) {}
 
 ShelfID TestShelfDelegate::GetShelfIDForAppID(const std::string& app_id) {
   for (auto const& iter : shelf_id_to_app_id_map_) {