Makes WorkspaceLayoutManager use ash/wm/common types

ash/wm/maximize_mode/maximize_mode_window_manager_unittest.cc

Index: ash/wm/maximize_mode/maximize_mode_window_manager_unittest.cc
diff --git a/ash/wm/maximize_mode/maximize_mode_window_manager_unittest.cc b/ash/wm/maximize_mode/maximize_mode_window_manager_unittest.cc
index cfd7f1b5f4de4187142ae3d6f363c370ba3107dc..8564086eddc92f84d3c2913d84f72c9f498defb2 100644
--- a/ash/wm/maximize_mode/maximize_mode_window_manager_unittest.cc
+++ b/ash/wm/maximize_mode/maximize_mode_window_manager_unittest.cc
@@ -10,9 +10,9 @@
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shell.h"
-#include "ash/switchable_windows.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/shell_test_api.h"
+#include "ash/wm/common/switchable_windows.h"
 #include "ash/wm/common/window_state.h"
 #include "ash/wm/common/wm_event.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
@@ -134,8 +134,7 @@ class MaximizeModeWindowManagerTest : public test::AshTestBase {
     if (!can_resize)
       window->SetProperty(aura::client::kCanResizeKey, false);
     aura::Window* container = Shell::GetContainer(
-        Shell::GetPrimaryRootWindow(),
-        kSwitchableWindowContainerIds[0]);
+        Shell::GetPrimaryRootWindow(), wm::kSwitchableWindowContainerIds[0]);
     container->AddChild(window);
     return window;
   }