Hide docked windows behind a flag

chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.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 "chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 45 matching lines @@
 #include "ui/aura/window_targeter.h"
 #endif
 
 #if defined(USE_AURA) && !defined(OS_CHROMEOS)
 #include "chrome/browser/ui/views/frame/desktop_browser_frame_aura.h"
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 #endif
 
 #if defined(USE_ASH)
 #include "ash/aura/wm_window_aura.h"
+#include "ash/common/ash_switches.h"
 #include "ash/common/wm/root_window_finder.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/shell.h"
 #include "ash/test/cursor_manager_test_api.h"
 #include "ash/test/immersive_fullscreen_controller_test_api.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm/window_util.h"
 #include "chrome/browser/ui/views/frame/immersive_mode_controller.h"
 #include "chrome/browser/ui/views/frame/immersive_mode_controller_ash.h"
 #include "ui/aura/client/screen_position_client.h"
@@ skipping 2391 matching lines @@
                  test,
                  gfx::Point(target_point.x(), 1 + target_point.y()),
                  iteration - 1)));
 }
 
 }  // namespace
 
 // Drags from browser to separate window, docks that window and releases mouse.
 IN_PROC_BROWSER_TEST_P(DetachToBrowserTabDragControllerTest,
                        DetachToDockedWindowFromMaximizedWindow) {
+  // Enable docked windows for this test.
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      ash::switches::kAshEnableDockedWindows);
+
   // Maximize the initial browser window.
   browser()->window()->Maximize();
   ASSERT_TRUE(browser()->window()->IsMaximized());
 
   // Add another tab.
   AddTabAndResetBrowser(browser());
   TabStrip* tab_strip = GetTabStripForBrowser(browser());
 
   // Move to the first tab and drag it enough so that it detaches.
   gfx::Point tab_0_center(
@@ skipping 56 matching lines @@
                         DetachToBrowserTabDragControllerTest,
                         ::testing::Values("mouse", "touch"));
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTestTouch,
                         ::testing::Values("touch"));
 #else
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTest,
                         ::testing::Values("mouse"));
 #endif