Remove WmWindowProperty

ash/wm/panels/panel_window_resizer_unittest.cc

Index: ash/wm/panels/panel_window_resizer_unittest.cc
diff --git a/ash/wm/panels/panel_window_resizer_unittest.cc b/ash/wm/panels/panel_window_resizer_unittest.cc
index 12164acea632926a0617097b0ba0a242193dd1e7..5d34b5535fd90de079e6760d68ca5cf17ba6150e 100644
--- a/ash/wm/panels/panel_window_resizer_unittest.cc
+++ b/ash/wm/panels/panel_window_resizer_unittest.cc
@@ -13,7 +13,6 @@
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
-#include "ash/common/wm_window_property.h"
 #include "ash/public/cpp/shelf_types.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/public/cpp/window_properties.h"
@@ -132,8 +131,7 @@ class PanelWindowResizerTest : public test::AshTestBase {
     for (std::vector<aura::Window *>::const_iterator
              iter = window_order.begin();
          iter != window_order.end(); ++iter, ++panel_index) {
-      ShelfID id =
-          WmWindow::Get(*iter)->GetIntProperty(WmWindowProperty::SHELF_ID);
+      ShelfID id = *iter->GetProperty(kShelfIDKey);
       EXPECT_EQ(id, model_->items()[panel_index].id);
     }
   }