Make ui_controls only usable from interactive_ui_tests. This has two benefits:

ash/wm/window_properties.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/window_properties.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/wm/always_on_top_controller.h"
 #include "ash/wm/frame_painter.h"
 #include "ui/aura/window_property.h"
@@ skipping 14 matching lines @@
 DEFINE_WINDOW_PROPERTY_KEY(bool, kIgnoreSoloWindowFramePainterPolicy, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kIgnoredByShelfKey, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kImmersiveModeKey, false);
 DEFINE_WINDOW_PROPERTY_KEY(
     ui::WindowShowState, kRestoreShowStateKey, ui::SHOW_STATE_DEFAULT);
 DEFINE_WINDOW_PROPERTY_KEY(RootWindowController*,
                            kRootWindowControllerKey, NULL);
 DEFINE_WINDOW_PROPERTY_KEY(
     ash::FramePainter*, kSoloWindowFramePainterKey, NULL);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kStayInSameRootWindowKey, false);
-DEFINE_OWNED_WINDOW_PROPERTY_KEY(ui_controls::UIControlsAura,
-                                 kUIControlsKey,
-                                 NULL);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kUsesScreenCoordinatesKey, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kUserChangedWindowPositionOrSizeKey, false);
 DEFINE_OWNED_WINDOW_PROPERTY_KEY(gfx::Rect,
                                  kPreAutoManagedWindowBoundsKey,
                                  NULL);
 DEFINE_WINDOW_PROPERTY_KEY(ash::WindowPersistsAcrossAllWorkspacesType,
                            kWindowPersistsAcrossAllWorkspacesKey,
                            WINDOW_PERSISTS_ACROSS_ALL_WORKSPACES_VALUE_DEFAULT);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kWindowPositionManagedKey, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kWindowRestoresToRestoreBounds, false);
 DEFINE_WINDOW_PROPERTY_KEY(bool, kWindowTrackedByWorkspaceKey, true);
 
 }  // namespace internal
 }  // namespace ash