fix property linkage warnings

ash/wm/window_properties.cc

Index: ash/wm/window_properties.cc
diff --git a/ash/wm/window_properties.cc b/ash/wm/window_properties.cc
index 506d8d6ac48b88026d76ed2c77bcbea8d4c38b62..a4a9a902f0699c8cc0c43024918aab3a9bc74dac 100644
--- a/ash/wm/window_properties.cc
+++ b/ash/wm/window_properties.cc
@@ -7,10 +7,23 @@
 #include "ash/wm/shadow_types.h"
 #include "ui/aura/window_property.h"
 
+// Property type for bool and ui::WindowShowState are
+// defined in aura.
 DECLARE_WINDOW_PROPERTY_TYPE(ash::internal::ShadowType);
+DECLARE_WINDOW_PROPERTY_TYPE(ash::WindowPersistsAcrossAllWorkspacesType)
 
 namespace ash {
 namespace internal {
+
+DEFINE_WINDOW_PROPERTY_KEY(
+    bool, kChildWindowVisibilityChangesAnimatedKey, false);
+DEFINE_WINDOW_PROPERTY_KEY(
+    ui::WindowShowState, kRestoreShowStateKey, ui::SHOW_STATE_DEFAULT);
 DEFINE_WINDOW_PROPERTY_KEY(ShadowType, kShadowTypeKey, SHADOW_TYPE_NONE);
+DEFINE_WINDOW_PROPERTY_KEY(ash::WindowPersistsAcrossAllWorkspacesType,
+                           kWindowPersistsAcrossAllWorkspacesKey,
+                           WINDOW_PERSISTS_ACROSS_ALL_WORKSPACES_VALUE_DEFAULT);
+DEFINE_WINDOW_PROPERTY_KEY(bool, kWindowTrackedByWorkspaceKey, true);
+
 }  // namespace internal
 }  // namespace ash